JP2013022029A - Medical image diagnostic apparatus and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate and display treatment support data effective for cautery treatment using a puncture needle.SOLUTION: A medical image diagnostic apparatus 100 includes: an input part 13 having a cautery planned area setting function of setting a cautery planned area for a treatment object area on the basis of volume data collected when planning the cautery treatment, and a cautery area setting function of setting a cautery area by the puncture needle for the cautery treatment on the basis of the volume data collected when inserting the puncture needle; a cautery area data generation part 8 for generating cautery planned area data indicating the cautery planned area and cautery area data indicating the cautery area; an image data generation part 6 for generating image data on the basis of the volume data; a treatment support data generation part 11 for generating treatment support data by superimposing the cautery planned area data and the cautery area data on the image data; and a display part 12 for displaying the treatment support data.

Description

  Embodiments of the present invention provide medical image diagnosis that enables generation and display of treatment support data effective for ablation treatment of a treatment target region based on volume data collected from a three-dimensional region including a treatment target region of a patient. The present invention relates to an apparatus and a control program.

  The ultrasonic diagnostic apparatus radiates an ultrasonic pulse generated from a vibration element built in an ultrasonic probe into a subject, and receives an ultrasonic reflected wave caused by a difference in acoustic impedance of a living tissue by the vibration element. It collects various biological information. Recent ultrasonic diagnostic apparatus capable of electronically controlling the transmission / reception direction and focal point of ultrasonic waves by controlling the delay time of drive signals supplied to a plurality of vibration elements and reception signals obtained from the vibration elements. Since real-time image data can be easily observed with a simple operation by simply bringing the tip of the ultrasonic probe into contact with the body surface, it is widely used for morphological diagnosis and functional diagnosis of living organs.

  On the other hand, in recent years, a puncture needle is inserted into a lesion site (hereinafter referred to as a treatment target region) of a patient under observation of image data obtained by a medical image diagnostic apparatus such as such an ultrasonic diagnostic apparatus. A so-called radio wave, in which a method of cauterizing the treatment target area by microwaves or radio waves emitted from the tip of the puncture needle is developed, and in particular, the treatment target area is solidified by irradiation with radio waves. Radiofrequency ablation (RFA) is becoming indispensable as a treatment method for liver tumors and the like because a local ablation region can be easily and reliably controlled.

  For example, when ablation treatment is performed on a treatment target region under observation of ultrasonic image data, the puncture needle is attached to a puncture adapter provided integrally with the ultrasonic probe and displayed together with the treatment target region. The puncture needle is inserted into the patient while confirming the position of the tip of the puncture needle in the region to be treated or in the vicinity thereof based on the ultrasonic image data.

  Further, puncture needle data (puncture guide) indicating the insertion position and insertion direction of the puncture needle is generated based on the respective position information obtained by the position detector provided in the puncture needle and the ultrasonic probe, and the treatment target region There has been proposed a method that enables more accurate insertion of a puncture needle by superimposing and displaying it on ultrasonic image data.

Japanese Patent Laying-Open No. 2005-58584

  However, since a normal puncture needle does not have sufficient hardness, for example, when the hardness of the biological tissue in the puncture route is uneven, the puncture direction set in advance by puncture needle data or the like is It is extremely difficult to place the tip of the puncture needle at the center of the treatment target area when the needle is inserted in a different direction, especially when the distance from the body surface to the treatment target part is long or accompanied by body movement. It becomes.

  For this reason, when the tip of the puncture needle is inserted away from the center of the treatment target region, a medical worker in charge of the cauterization treatment (hereinafter referred to as an operator) is treated. It is necessary to decide whether to continue the cauterization treatment with the ablation area expanded so that all of the target area is included, or to repeat the insertion of the puncture needle into the treatment target area. It has been difficult to obtain medical information for making accurate judgments accurately and in a short time from the conventional method described above.

  As a provisional solution to such a problem, methods such as setting a cautery area having a margin with respect to the area to be cauterized have been taken, but there are many as the ablation area expands. The normal tissue was cauterized.

  The present disclosure has been made in view of the above-described problems, and the purpose of the present disclosure is to insert the distal end of the patient's treatment target area into or near the treatment target area. It is an object of the present invention to provide a medical image diagnostic apparatus and a control program capable of supporting a safe and efficient ablation treatment by displaying an ablation area by a puncture needle for ablation treatment before the ablation treatment.

  In order to solve the above problems, a medical image diagnostic apparatus according to an embodiment of the present disclosure supports a medical image that supports ablation treatment of a treatment target region based on volume data collected from a three-dimensional region including the treatment target region of a patient. An ablation plan area setting means for setting an ablation plan area for the treatment target area based on volume data collected at the time of ablation treatment planning, and volume data collected at the time of puncture needle insertion or the volume data Ablation area setting means for setting the ablation area by the puncture needle for ablation treatment based on the image data generated by projecting the image on a predetermined projection plane, ablation planning area data indicating the ablation planning area, and ablation indicating the ablation area Treatment support by superimposing region data on image data generated based on the volume data A treatment support data generating means for generating over data, it is characterized in that a display means for displaying the therapeutic assistance data.

1 is a block diagram showing an overall configuration of a medical image diagnostic apparatus according to an embodiment. The block diagram which shows the specific structure of the transmission / reception part with which the medical image diagnostic apparatus of this embodiment is provided, and a received signal processing part. The figure for demonstrating the relationship between the coordinate system with respect to the ultrasonic probe of the embodiment, and an ultrasonic transmission / reception direction. The block diagram which shows the specific structure of the volume data generation part with which the medical image diagnostic apparatus of this embodiment is provided. The block diagram which shows the specific structure of the image data generation part with which the medical image diagnostic apparatus of this embodiment is provided. The figure which shows the specific structure of the RFA puncture needle with which the adapter for puncture of this embodiment is mounted | worn. The figure which shows the specific example of the 1st treatment assistance data produced | generated by the treatment assistance data generation part of this embodiment. The figure which shows the specific example of the 3rd treatment assistance data produced | generated by the treatment assistance data generation part of this embodiment. The figure which shows the specific example of the 1st treatment assistance data displayed on the display part of this embodiment. The flowchart which shows the production | generation / display procedure of the shochu plan area data in this embodiment. The flowchart which shows the evaluation procedure of the cauterization area | region in this embodiment.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

(Embodiment)
In the medical image diagnostic apparatus of the present embodiment described below, first, the ablation plan area for the treatment target region is set based on the volume data collected from the patient at the time of ablation treatment planning, and then the volume at the time of puncture needle insertion An ablation area inscribed in the ablation planning area described above is set around the tip of the RAF puncture needle detected based on the data. Subsequently, the quality of the cauterization area with respect to the cauterization plan area is evaluated based on the shape ratio between the cauterization plan area data indicating the cauterization plan area and the cauterization area data indicating the cauterization area. Then, the above-mentioned ablation plan area data and ablation area data are superimposed on the MPR image data of a predetermined cross section generated based on the volume data at the time of insertion of the puncture needle, and further, the evaluation result of the ablation area is added to the above-mentioned The treatment support data effective for the ablation treatment in the treatment target area is generated.

  In the following embodiments, the case where an RFA puncture needle is used as the puncture needle for ablation treatment will be described, but ablation treatment may be performed on a treatment target region using another puncture needle for ablation treatment. Although the case where treatment support data is generated based on volume data collected by ultrasonic transmission / reception for the patient will be described, treatment is performed based on volume data collected by other imaging means such as X-ray imaging and MRI imaging. Support data may be generated.

  Furthermore, a case where treatment support data is generated based on volume data collected using a so-called two-dimensional array ultrasonic probe in which a plurality of vibration elements are two-dimensionally arranged will be described, but the present invention is not limited to this. For example, the above-described treatment support data may be generated based on volume data collected by mechanically moving or rotating an ultrasonic probe in which a plurality of vibration elements are one-dimensionally arranged.

(Configuration and function of the device)
The configuration and function of the medical image diagnostic apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a block diagram showing an overall configuration of the medical image diagnostic apparatus, and FIG. 2 is a block diagram showing a specific configuration of a transmission / reception unit and a received signal processing unit included in the medical image diagnostic apparatus. 4 and 5 are block diagrams showing specific configurations of the volume data generation unit and the image data generation unit provided in the above-described medical image diagnostic apparatus.

  The medical diagnostic imaging apparatus 100 according to the present embodiment shown in FIG. 1 applies to a three-dimensional region in a patient's body before insertion of the RFA puncture needle 15 (when ablation treatment is planned) or during insertion (when puncture needle is inserted). A plurality of vibration elements that radiate transmission ultrasonic waves (ultrasonic pulses) and convert reception ultrasonic waves (ultrasonic reflected waves) obtained from the three-dimensional region into electric reception signals by the transmission ultrasonic waves are provided. The ultrasonic probe 2 and a drive signal for radiating transmission ultrasonic waves in a predetermined direction of the three-dimensional region are supplied to the above-described vibration elements, and a plurality of channels of reception signals obtained from these vibration elements are received. Based on the transmission / reception unit 3 that performs phasing addition, the reception signal processing unit 4 that performs signal processing on the reception signal after phasing addition and generates B-mode data, and the B-mode data obtained in units of ultrasonic transmission / reception directions. Generate volume data A volume data generation unit 5, and an image data generation unit 6 to generate a three-dimensional image data and the MPR image data by performing predetermined processing on the volume data.

  The medical image diagnostic apparatus 100 includes a puncture needle position information detection unit 7 that detects position information of the RFA puncture needle 15 based on a position signal supplied from the RFA puncture needle 15 attached to the ultrasonic probe 2, and an ablation. An ablation planning area data having a predetermined shape is generated based on the center of the treatment target area set at the time of treatment planning (hereinafter referred to as treatment center), and further, the RFA puncture needle detected at the time of puncture needle insertion The ablation area data generation unit 8 that generates maximum ablation area data and ablation area data based on the tip position information of 15, and the ablation area of the ablation area by the RFA puncture needle 15 based on the comparison result between the ablation planning area data and the ablation area data The ablation area evaluation unit 9 for evaluating the quality, the center of the ablation plan area set for the ablation area at the time of the ablation plan, and the treatment area at the time of puncture needle insertion Alternatively, a puncture needle tip distance measuring unit 10 that measures a distance from the tip of the RFA puncture needle 15 inserted in the vicinity thereof (hereinafter referred to as a puncture needle tip distance), and generated at the time of ablation treatment planning. First treatment support data is generated by superimposing the ablation plan area data on the MPR image data of the predetermined section, and the maximum ablation area data and the ablation plan area are added to the MPR image data of the predetermined section generated at the time of puncture needle insertion. The second treatment support data on which the data is superimposed and the MPR image data are superimposed on the maximum ablation area data, the ablation planning area data, and the ablation area data, and the measurement result of the puncture needle tip distance and the evaluation result of the ablation area are added. A treatment support data generation unit 11 that generates three treatment support data, and further includes the above-described three-dimensional image data, MPR image data, and first to third treatment data. A display unit 12 for displaying support data, an input unit 13 for setting a treatment center, setting an ablation plan area, setting an ablation area, inputting various instruction signals, and the like, and a system for comprehensively controlling each unit described above A control unit 14 is provided.

  The ultrasonic probe 2 has N (N = N1 × N2) vibrating elements (not shown) arranged two-dimensionally at its distal end, and transmits and receives ultrasonic waves by bringing this distal end into contact with the patient's body surface. Do. Each of the vibration elements is connected to the transmission / reception unit 3 via an N-channel multi-core cable (not shown). These vibration elements are electroacoustic transducers that convert drive signals (electrical pulses) into transmission ultrasonic waves (ultrasonic pulses) during transmission, and receive ultrasonic waves (ultrasonic reflected waves) as electrical reception signals during reception. It has the function to convert to. Further, a puncture adapter 21 is provided on the side surface of the ultrasonic probe 2 to set the insertion direction of the RFA puncture needle 15 used for the ablation treatment and to be slidably held in the insertion direction.

  The ultrasonic probe 2 has a sector scan support, a linear scan support, a convex scan support, and the like, and the operator can arbitrarily select according to the diagnostic part. A case will be described in which the sector scanning ultrasonic probe 2 in which the vibration elements are two-dimensionally arranged is used.

  Next, the transmission / reception unit 3 illustrated in FIG. 2 includes a transmission unit 31 that supplies a drive signal to the vibration element of the ultrasonic probe 2 and a phasing addition to the N-channel reception signal obtained from the vibration element. The receiving part 32 which performs is provided.

  The transmission unit 31 includes a rate pulse generator 311, a transmission delay circuit 312, and a drive circuit 313, and the rate pulse generator 311 generates a rate pulse that determines the repetition period of the transmission ultrasonic wave and transmits the transmission delay circuit 312. To supply. The transmission delay circuit 312 provides the rate pulse with a focusing delay time for focusing the transmission ultrasonic wave to a predetermined depth and a deflection delay time for transmitting the transmission ultrasonic wave in a predetermined direction. Is supplied to the drive circuit 313. The drive circuit 313 has the same number of N-channel independent drive circuits as the transmission delay circuit 312, and drives the N vibration elements incorporated in the ultrasonic probe 2 to transmit the transmission ultrasonic waves into the patient's body. Radiate.

  On the other hand, the receiving unit 32 includes an A / D converter 321 and a reception delay circuit 322 configured by N channels, and an adder 323. An N channel received signal supplied from the vibration element is an A / D signal. The signal is converted into a digital signal by the converter 321 and sent to the reception delay circuit 322. The reception delay circuit 322 generates from the A / D converter 321 a focusing delay time for focusing the received ultrasonic waves from a predetermined depth and a deflection delay time for setting the reception directivity with respect to a predetermined direction. The adder 323 adds the reception signals supplied from the reception delay circuit 322 to each of the output N-channel reception signals. That is, the reception delay circuit 322 and the adder 323 phasing and adding the reception signals obtained from the predetermined direction (that is, adding and combining the phases of the reception signals corresponding to the reception ultrasonic waves from the predetermined direction).

  FIG. 3 shows the ultrasonic transmission / reception direction (θp, φq) with respect to the orthogonal coordinate system (pqr) with the central axis of the ultrasonic probe 2 as the r-axis. Two-dimensionally arranged in the p-axis direction and the q-axis direction, and θp and φq indicate transmission / reception directions projected on the pr plane and the qr plane.

  Returning to FIG. 2, the reception signal processing unit 4 includes an envelope detector 411 and a logarithmic converter 412, and the envelope detector 411 receives the phasing addition supplied from the adder 323 of the reception unit 32. The signal is envelope-detected, and the logarithmic converter 412 generates B-mode data by logarithmically converting the amplitude of the reception signal subjected to the envelope detection. Note that the envelope detector 411 and the logarithmic converter 412 may be configured in the reverse order.

  Next, the volume data generation unit 5 includes an ultrasonic data storage unit 51, an interpolation processing unit 52, and a volume data storage unit 53, as shown in FIG. 4, and the ultrasonic data storage unit 51 includes an ultrasonic wave for the patient. The B-mode data generated by the reception signal processing unit 4 based on the reception signal obtained by the three-dimensional scanning is sequentially stored with the information on the transmission / reception direction (θp, φq) supplied from the system control unit 14 as supplementary information. .

  On the other hand, the interpolation processing unit 52 forms three-dimensional ultrasonic data by arranging the B-mode data read from the ultrasonic data storage unit 51 in correspondence with the transmission / reception direction (θp, φq), and further, this three-dimensional ultrasonic data. Volume data is generated by interpolating the ultrasonic data. The obtained volume data is stored in the volume data storage unit 53.

  Next, a specific configuration of the image data generation unit 6 shown in FIG. 1 will be described with reference to FIG. The image data generation unit 6 in FIG. 5 includes a three-dimensional image data generation unit 61 that generates three-dimensional image data based on the volume data supplied from the volume data generation unit 5 at the time of ablation treatment planning, and at the time of ablation treatment planning and puncture. An MPR image data generation unit 62 that generates MPR image data of a predetermined cross section based on volume data supplied from the volume data generation unit 5 at the time of needle insertion, and image data that stores the above-described three-dimensional image data and MPR image data The three-dimensional image data generation unit 61 includes a storage unit 63, and includes a volume data correction unit 611, an opacity / color tone setting unit 612, and a rendering processing unit 613.

  The volume data correction unit 611 is the inner product of a preset line-of-sight vector for three-dimensional display and a normal vector for the organ boundary surface of the volume data supplied from the volume data storage unit 53 of the volume data generation unit 5. The opacity / color tone setting unit 612 performs correction based on the value, and sets opacity and color tone based on the corrected voxel value. The rendering processing unit 613 renders the volume data described above based on the opacity and color tone set by the opacity / color tone setting unit 612, and generates three-dimensional image data.

  That is, each unit included in the three-dimensional image data generation unit 61 generates the three-dimensional image data for setting the treatment center by performing the above-described processing on the volume data collected at the time of the ablation treatment plan.

  On the other hand, the MPR image data generation unit 62 includes an MPR cross-section forming unit 621 and a voxel extraction unit 622 as shown in FIG. 5, and the MPR cross-section forming unit 621 includes treatment center setting information supplied from the input unit 13 and Based on the position information of the RFA puncture needle 15 supplied from the puncture needle position information detector 7, the first MPR section to the third MPR section are formed.

  The voxel extraction unit 622 sets the above-described MPR cross section for each of the volume data at the time of ablation treatment planning and the volume data at the time of insertion of the puncture needle supplied from the volume data storage unit 53 of the volume data generation unit 5, MPR image data is generated by extracting voxels of the volume data existing in these MPR sections.

  For example, the MPR cross-section forming unit 621 described above includes the treatment center set by the input unit 13 based on the three-dimensional image data generated at the time of ablation treatment planning, and is parallel to the pr plane or the qr plane of FIG. A first MPR cross section is formed, and further, a second MPR cross section and a third MPR cross section that include the above-described treatment center and are orthogonal to the first MPR cross section are formed. Then, the voxel extraction unit 622 sets the first MPR cross section to the third MPR cross section for the volume data at the time of the ablation treatment plan supplied from the volume data storage unit 53, and the voxels existing in these MPR cross sections. Is used to generate MPR image data used for the first treatment support data.

  Further, the MPR cross section forming unit 621 receives tip position information of the RFA puncture needle 15 supplied from the puncture needle position information detection unit 7 at the time of puncture needle insertion and position information indicating the position and direction of the entire RFA puncture needle. To do. Next, based on the positional information of the RFA puncture needle 15, a first MPR cross section including the RFA puncture needle 15 inserted into the patient's body and the center of the ablation planning area is formed, and further, the ablation planning area A second MPR section and a third MPR section are formed that include the center or the distal end portion of the RFA puncture needle 15 and are orthogonal to the first MPR section. The voxel extraction unit 622 sets the first MPR cross section to the third MPR cross section for the puncture needle insertion volume data supplied from the volume data storage unit 53, and exists in these MPR cross sections. MPR image data used for the second treatment support data and the third treatment support data is generated by extracting the voxels.

  Next, the puncture needle position information detection unit 7 is based on a position signal from a position sensor 153 provided at the tip of the RFA puncture needle 15 that is slidably mounted on the puncture adapter 21 of the ultrasonic probe 2. The tip position information of the RFA puncture needle 15 inserted in or near the treatment target area is detected, and the tip position information and the tip position information of the RFA puncture needle 15 immediately before the insertion or the end of the puncture adapter 21 are detected. Position information indicating the position and direction of the RFA puncture needle 15 is detected based on the position information and the like.

  The ablation area data generation unit 8 includes an ablation pattern storage unit, an ablation pattern processing unit, and an ablation area data storage unit (not shown). In the ablation pattern storage unit, basic ablation patterns corresponding to various RFA puncture needles are identified as puncture needles. Information is stored in advance as incidental information.

  On the other hand, the ablation pattern processing unit receives selection information of the RFA puncture needle 15 supplied from the input unit 13 via the system control unit 14 at the time of ablation treatment planning, and stores various basics stored in the ablation pattern storage unit described above. A basic ablation pattern corresponding to the RFA puncture needle 15 is extracted from the ablation pattern based on the puncture needle identification information included in the selection information. Next, according to the processing instruction signal supplied from the input unit 13 based on the region information (the center position (treatment center), size, shape, etc. of the treatment target region) of the treatment target region in the MPR image data displayed on the display unit 12. Then, the above-mentioned basic ablation pattern is subjected to processing such as reduction / extension / rotation to generate ablation plan area data corresponding to the treatment target area. The obtained ablation plan area data is stored in the ablation area data storage unit with the center position information as supplementary information.

  The ablation pattern processing unit receives tip position information of the RFA puncture needle 15 at the time of puncture needle detection detected by the puncture needle position information detection unit 7 and reads the ablation plan area data read from the ablation area data storage unit. The maximum ablation area data is generated by arranging the center at the tip position of the RFA puncture needle 15 and then expanding it to a predetermined size. The obtained maximum ablation area data is stored in the ablation area data storage unit with the center position information as supplementary information. At this time, the size of the maximum ablation area data generated by the ablation pattern processing unit is the maximum value of the ablation energy supplied to the RFA puncture needle 15 from the separately installed ablation treatment device or the RFA puncture needle 15. It is determined by the shape of the developed needle 152 described later.

  Further, the ablation pattern processing unit is ablation area supplied from the input unit 13 based on the ablation plan area data and the maximum ablation area data indicated in the MPR image data at the time of insertion of the puncture needle displayed on the display unit 12. In accordance with the setting instruction signal, ablation area data is generated by performing reduction processing on the maximum ablation area data read from the ablation area data storage unit. The obtained ablation area data is stored in the ablation area data storage unit with the center position information as supplementary information in the same manner as the ablation planning area data and the maximum ablation area data. The ablation pattern processing unit desirably performs a reduction process on the maximum ablation area data so that a part of the ablation plan area data is inscribed in the maximum ablation area data, but is not particularly limited.

  Next, the ablation area evaluation unit 9 includes an area data measurement unit and a measurement data comparison unit (not shown). The area data measurement unit measures the volume, radius, diameter, and the like of the ablation plan area data and the ablation area data read from the ablation area data storage unit of the ablation area data generation unit 8, and further, based on these measurement results. The volume ratio, radius ratio, diameter ratio, etc. of the ablation area data with respect to the ablation planning area data are measured (hereinafter collectively referred to as the shape ratio). On the other hand, the measurement data comparison unit evaluates the quality of the ablation area relative to the ablation plan area by comparing the shape ratio measured by the area data measurement unit with a predetermined threshold value α.

  The puncture needle tip distance measurement unit 10 obtains the ablation planned region data supplied from the ablation region data storage unit of the ablation region data generation unit 8 and the tip position information of the RFA puncture needle 15 supplied from the puncture needle position information detection unit 7. Receive. Then, the distance (puncture needle tip distance) between the distal end portion of the RFA puncture needle 15 inserted in or near the treatment target region at the time of puncture needle insertion and the ablation planning region set at the time of ablation treatment planning or the center thereof. measure.

  Next, the treatment support data generation unit 11 is formed with a predetermined section (for example, formed by the MPR section formation unit 621) generated by the MPR image data generation unit 62 of the image data generation unit 6 based on the volume data at the time of the ablation treatment plan. The ablation plan read from the ablation area data storage unit of the ablation area data generation unit 8 into the MPR image data of the first MPR cross section including the center of the ablation planning area and parallel to the pr plane or the qr plane in FIG. The first treatment support data is generated by superimposing the region data.

  In addition, the treatment support data generation unit 11 includes a predetermined section (for example, the RFA puncture needle 15 and the center of the ablation plan area, which is generated by the MPR image data generation unit 62 based on the volume data at the time of puncture needle insertion. (1 MPR section) MPR image data of the ablation area data generation unit 8 of the ablation area data generation unit 8 is superimposed on the ablation planning area data and the maximum ablation area data to generate second treatment support data, Superposition of ablation plan area data, maximum ablation area data and ablation area data with respect to the MPR image data, measurement result of puncture needle tip distance, evaluation result of ablation area, and position information of RFA puncture needle 15 (puncture needle data described later) The third treatment support data is generated by adding.

  However, the generation of the second treatment support data by the treatment support data generation unit 11 and the display on the display unit 12 are the tip position of the RFA puncture needle 15 and the ablation plan area or the maximum ablation area and the ablation plan area at the time of puncture needle insertion. And when a predetermined display condition is satisfied. For example, when the distal end portion of the RFA puncture needle 15 at the time of puncture needle insertion is within the ablation plan area, or when all of the ablation plan area is included within the maximum ablation area, the treatment support data generation unit 11 Generates the second treatment support data by superimposing the above-mentioned maximum ablation area data and ablation plan area data on the MPR image data at the time of insertion of the puncture needle.

  Next, the display unit 12 includes a display data generation unit, a data conversion unit, and a monitor (not shown). The display data generation unit receives the first treatment support data through the third treatment support data generated by the three-dimensional image data, the MPR image data, or the treatment support data generation unit 11 generated by the image data generation unit 6 in a predetermined manner. The display data is converted into a display format to generate display data, and the data conversion unit performs conversion processing such as D / A conversion and television format conversion on the display data and displays the display data on the monitor.

  On the other hand, the input unit 13 includes input devices such as a display panel, a keyboard, a trackball, a mouse, a selection button, and an input button on the operation panel, and inputs patient information, selection of the RFA puncture needle 15, and volume data generation conditions. Setting, setting of treatment center, setting of ablation plan area, setting of ablation area, setting of threshold value α, and input of various instruction signals are performed.

  The system control unit 14 includes a CPU and a storage circuit (not shown), and the above-described various information input / set / selected by the input unit 13 is stored in the storage circuit. On the other hand, the CPU performs three-dimensional ultrasonic scanning on the treatment target region of the patient by comprehensively controlling each unit included in the medical image diagnostic apparatus 100 using the various information described above, and the cautery obtained at this time Based on the volume data at the time of treatment planning and the volume data at the time of puncture needle insertion, generation and display of various treatment support data effective for ablation treatment planning and ablation treatment are executed.

  Next, the structure of the RFA puncture needle 15 attached to the puncture adapter 21 of the ultrasonic probe 2 will be described with reference to FIG. 6A shows the RFA puncture needle 15 before the deployment needle 152, which will be described later, is deployed, and FIG. 6B shows the RFA puncture needle 15 in which the deployment needle 152 is deployed. That is, the RFA puncture needle 15 is inserted into the body in a state where the needle-like hand piece 151 having a hollow structure that is percutaneously inserted into the patient's body and the center of the hand piece 151 is housed. From a plurality of deployment needles 152 deployed from the distal end portion so as to surround the treatment target region, a position sensor 153 attached to the distal end portion of the handpiece 151, and a drive unit of a cautery treatment apparatus installed separately. A lead wire 154 that supplies an alternating current of a predetermined frequency (for example, 500 KHz) to the deployment needle 152 and a signal line (not shown) that supplies a position signal detected by the position sensor 153 to the puncture needle position information detection unit 7 are provided. .

  The deployment needle 152 driven by the above-described alternating current performs ablation treatment on the treatment target region by irradiating a radio wave of the same frequency from the tip thereof, and the puncture needle position information detection unit 7 includes the position sensor 153. The tip position information of the RFA puncture needle 15 is detected based on the above-described position signal supplied from. FIG. 6 shows the RFA puncture needle 15 having four deployment needles 152, but an RFA puncture needle having eight to ten deployment needles is used in normal radiofrequency ablation therapy.

  Next, specific examples of the first treatment support data and the third treatment support data generated by the treatment support data generation unit 11 will be described with reference to FIGS.

  FIG. 7 shows a specific example of the first treatment support data generated by the treatment support data generation unit 11 at the time of the ablation treatment plan. The first treatment support data Ca1 includes the image data generation unit 6 of the first treatment support data Ca1. MPR image data generation unit 62 generates MPR image data Da1 generated by setting a first MPR cross section Sa1 including the center Po of the treatment target region in the volume data at the time of ablation treatment planning and parallel to the pr plane; The ablation area data generation unit 8 includes the ablation planning area data B2 generated for the treatment target area B1 indicated in the MPR image data Da1, and the ablation planning area data B2 is superimposed on the above-described MPR image data Da1. First treatment support data Ca1 in the first MPR section Sa1 is generated. In addition, the first treatment support data Da2 and Da3 (not shown) in the second MPR section Sa2 and the third MPR section Sa3 orthogonal to each other with respect to the first MPR section Sa1 are also generated by the same procedure. .

  On the other hand, FIG. 8 shows a specific example of the third treatment support data generated by the treatment support data generation unit 11 at the time of puncture needle insertion, and the third treatment support data Cb1 includes MPR image data. The generation unit 62 punctures the first MPR section Sb1 including the puncture needle data Go based on the position information of the RFA puncture needle 15 supplied from the puncture needle position information detection unit 7 and the center Po of the ablation planning area B2. MPR image data Db1 generated by setting the volume data at the time of needle insertion, and the maximum ablation area data Am and ablation area data generated by the ablation area data generation unit 8 centering on the distal end portion Px of the RFA puncture needle 15 Ax is included.

  That is, the maximum ablation area data Am and the ablation area data Ax are superimposed on the above-described MPR image data Db1, and the ablation area evaluation result E1 supplied from the ablation area evaluation unit 9 or the puncture needle tip distance measurement unit 10 is supplied. Corresponds to the measurement result E2 of the puncture needle tip distance, and puncture needle data Go corresponding to the position information of the RFA puncture needle 15 supplied from the puncture needle position information detection unit 7 via the system control unit 14 and the tip position information. The third treatment support data Db1 in the first MPR section Sb1 is generated by adding the tip portion Px and the like. Further, third treatment support data Db2 and Db3 (not shown) in the second MPR section Sb2 and the third MPR section Sb3 orthogonal to each other with respect to the first MPR section Sb1 are also generated by the same procedure. .

  In FIG. 8, as already described, when the distal end portion Px of the RFA puncture needle 15 inserted in or near the treatment target region B1 is included in the ablation plan region data B2, or the ablation plan Second treatment support data (not shown) in which the maximum ablation area data Am and the ablation planning area data B2 are superimposed on the MPR image data Db1 when the entire area of the area data B2 is included in the maximum ablation area data Am. Display) starts.

  In the second treatment support data generated by superimposing the maximum ablation area data Ax and the ablation planning area data B2 on the MPR image data Db1, the maximum ablation area data Ax is significantly larger than the ablation planning area data B2. In this case, the ablation area data generation unit 8 performs a reduction process on the maximum ablation area data Am in accordance with the setting information supplied from the input unit 13 until it is inscribed in the ablation plan area data B2, thereby ablating treatment of the treatment target area B1. Ablation area data Ax indicating a suitable ablation area (that is, an ablation area that can cauterize all of the lesions and prevent the spread of damage to normal tissue) is generated.

  Next, a specific example of the first treatment support data displayed on the monitor of the display unit 12 will be described with reference to FIG. In the display of the first treatment support data on the display unit 12, for example, in the upper left area of the monitor, the MPR image data generation unit 62 sets the first MPR section Sa1 for the volume data at the time of ablation treatment planning. First treatment support data Ca1 (in which the ablation plan data B2 generated by the ablation region data generation unit 8 with respect to the treatment target region B1 (not shown) of the MPR image data Da1 is superimposed on the generated MPR image data Da1 ( FIG. 7) is shown.

  In the upper right area of the monitor, the first treatment in which the ablation plan area data B2 is superimposed on the MPR image data Da2 generated by setting the second MPR section Sa2 with respect to the volume data at the time of the ablation treatment plan. Support data Ca2 is shown, and in the lower left area of the monitor, the ablation plan area data B2 is superimposed on the MPR image data Da3 generated by setting the third MPR section Sa3 with respect to the volume data at the time of ablation treatment planning. The first treatment support data Ca3 is shown.

  On the other hand, in the upper left area of the monitor in the display of treatment support data for ablation treatment, for example, the MPR image data generation unit 62 generates the first MPR cross section Sb1 for the volume data at the time of puncture needle insertion. The third treatment support data Cb1 (see FIG. 8) in which the maximum ablation area data AM and the ablation area data Ax generated by the ablation area data generation unit 8 are superimposed on the MPR image data Db1 is shown.

  In the upper right area of the monitor, the maximum ablation area data AM and the ablation area data Ax are superimposed on the MPR image data Da2 generated by setting the second MPR section Sb2 to the volume data at the time of insertion of the puncture needle. The third treatment support data Cb2 (not shown) is further generated. In the lower left area of the monitor, MPR image data Db3 generated by setting the third MPR section Sb3 with respect to the volume data at the time of puncture needle insertion. The third treatment support data Cb3 (not shown) in which the maximum ablation area data AM and the ablation area data Ax are superimposed on each other are shown.

(Production / display procedure of shochu planning area data)
Next, a procedure for generating / displaying the ablation plan area data in the present embodiment will be described with reference to the flowchart of FIG. Prior to collecting volume data for the patient, the operator of the medical image diagnostic apparatus 100 inputs patient information at the input unit 13, and further selects the RFA puncture needle 15, sets volume data generation conditions, and sets a threshold value α. Etc. Then, the above-described input information, selection information, and setting information in the input unit 13 are stored in the storage circuit of the system control unit 14 (step S1 in FIG. 10).

  When the above initial setting is completed, the operator inputs a volume data collection start instruction signal at the input unit 13 with the ultrasonic probe 2 placed at a predetermined site of the patient (step S2 in FIG. 10). By supplying this instruction signal to the system control unit 14, collection of volume data for a three-dimensional region including the treatment target region of the patient is started.

  When collecting the volume data, the rate pulse generator 311 of the transmission unit 31 illustrated in FIG. 2 supplies the rate pulse generated according to the control signal from the system control unit 14 to the transmission delay circuit 312. The transmission delay circuit 312 has a delay time for focusing the ultrasonic wave to a predetermined depth and a delay time for transmitting the ultrasonic wave in the first transmission / reception direction (θ1, φ1) in order to obtain a narrow beam width in transmission. The rate pulse is supplied to the N-channel drive circuit 313. Next, the drive circuit 313 generates a drive signal having a predetermined delay time and shape based on the rate pulse supplied from the transmission delay circuit 312, and this drive signal is N-dimensionally arranged in the ultrasonic probe 2. The ultrasonic waves are transmitted to the individual vibrating elements and transmitted ultrasonic waves are emitted into the patient's body.

  A part of the radiated transmission ultrasonic wave is reflected by an organ boundary surface or tissue having different acoustic impedance, received by the vibration element, and converted into an N-channel electrical reception signal. Next, the received signal is converted into a digital signal by the A / D converter 321 of the receiving unit 32, and then the delay time for converging the received ultrasonic wave from a predetermined depth in the N-channel receiving delay circuit 322. And a delay time for setting a strong reception directivity with respect to the reception ultrasonic wave from the transmission / reception direction (θ1, φ1), and phasing addition is performed by the adder 323.

  On the other hand, the envelope detector 411 and the logarithmic converter 412 of the received signal processing unit 4 to which the received signal after the phasing addition is supplied perform envelope detection and logarithmic conversion on the received signal to obtain B-mode data. The generated B-mode data is stored in the ultrasonic data storage unit 51 of the volume data generation unit 5 with the information on the transmission / reception direction (θ1, φ1) as supplementary information.

  When the generation and storage of B-mode data for the transmission / reception direction (θ1, φ1) is completed, φq = φ1 + (q−1) Δφ (q = 2 to Q) in which the ultrasonic transmission / reception direction is updated by Δφ in the φ direction. ), Ultrasonic transmission / reception is performed with respect to the transmission / reception direction (θ1, φ2 to φQ) set, and the transmission / reception direction is updated by Δθ in the θ direction by θp = θ1 + (p−1) Δθ (p = 2 to Three-dimensional scanning is performed by repeating the above-described ultrasonic transmission / reception of φ1 to φQ for each of the transmission / reception directions θ2 to θP set by P). The B-mode data obtained by the ultrasonic transmission / reception is also stored in the ultrasonic data storage unit 51 of the volume data generation unit 5 with the above transmission / reception direction as supplementary information.

  Next, the volume data generation unit 5 forms the three-dimensional ultrasonic data by arranging the B mode data read from the ultrasonic data storage unit 51 in correspondence with the transmission / reception directions (θp, φq). Volume data is generated by interpolating the dimensional ultrasonic data. Then, the obtained volume data is stored in its own volume data storage unit 53 (step S3 in FIG. 10).

  Next, the image data generation unit 6 sets the voxel value of the volume data supplied from the volume data storage unit 53 of the volume data generation unit 5 to a preset three-dimensional display line-of-sight vector and normal vector to the organ boundary surface. And the opacity and color tone are set based on the corrected voxel value. Next, the volume data described above is rendered based on the obtained opacity and color tone to generate three-dimensional image data. Then, the obtained three-dimensional image data is displayed on the monitor of the display unit 12 (step S4 in FIG. 10).

  On the other hand, the operator who observed the three-dimensional image data displayed on the display unit 12 sets the center (treatment center) of the treatment target site in the above-described three-dimensional image data using the input device of the input unit 13 (see FIG. 10 step S5).

  Next, the MPR image data generation unit 62 of the image data generation unit 6 that has received the above setting information from the input unit 13 via the system control unit 14 includes the treatment center and the pr plane or the qr plane ( A first MPR section parallel to (see FIG. 3) is formed, and further, a second MPR section and a third MPR section that include the treatment center and are orthogonal to the first MPR section are formed (FIG. 10). Step S6). Then, the MPR image data generated by setting the first to third MPR sections for the volume data supplied from the volume data storage unit 53 and extracting the voxels existing in the MPR section is displayed. It displays on the part 12 (step S7 of FIG. 10).

  Next, the ablation area data generation unit 8 receives the selection information of the RFA puncture needle 15 supplied from the system control unit 14, and performs RFA from various basic ablation patterns stored in advance in its own ablation pattern storage unit. A basic cauterization pattern corresponding to the puncture needle 15 is extracted based on the puncture needle identification information included in the selection information. Next, according to the processing instruction signal supplied from the input unit 13 based on the region information (the center position (treatment center), size, shape, etc. of the treatment target region) of the treatment target region in the MPR image data displayed on the display unit 12. Then, processing such as reduction / enlargement / rotation is performed on the above basic ablation pattern to generate ablation planning area data suitable for ablation treatment of the treatment target area (step S8 in FIG. 10). Then, the obtained ablation plan area data is stored in its own ablation area data storage unit.

  Next, the treatment support data generation unit 11 generates the ablation generated by the ablation region data generation unit 8 on the MPR image data in the first to third MPR sections generated by the MPR image data generation unit 62 in step S7 described above. The first treatment support data) is generated by superimposing the plan area data, and the obtained first treatment support data is displayed on the monitor of the display unit 12 (step S9 in FIG. 10).

(Evaluation procedure of shochu area)
Next, the evaluation procedure for the ablation area in the present embodiment will be described with reference to the flowchart of FIG.

  The operator who has observed the ablation plan area data superimposed on the MPR image data by displaying the first treatment support data in step S9 of FIG. 10, the RFA puncture needle 15 attached to the puncture adapter 21 of the ultrasonic probe 2. The position and the inclination angle of the puncture adapter 21 are set so that the insertion direction and the center of the ablation plan area data intersect (step S11 in FIG. 11), and the RFA puncture needle 15 is moved along the puncture adapter 21. The patient is inserted into the body of the patient (step S12 in FIG. 11).

  On the other hand, the puncture needle position information detection unit 7 receives a position signal from a position sensor 153 provided at the distal end portion of the RFA puncture needle 15 inserted into the patient's body. Based on this position signal, the tip position information of the RFA puncture needle 15 inserted in or near the treatment target region of the patient is detected, and the tip position information and the RFA puncture needle 15 immediately before the insertion are detected. Based on the tip position information, position information indicating the position and direction of the RFA puncture needle 15 is detected (step S13 in FIG. 11).

  Next, the ablation area data generation unit 8 receives the tip position information of the RFA puncture needle 15 detected by the puncture needle position information detection unit 7. Next, the center of the ablation plan area data read out from the own ablation area data storage unit is arranged at the tip position of the RFA puncture needle 15, and this ablation plan area data is expanded according to the ablation energy of the ablation treatment apparatus. By doing so, maximum ablation area data is generated (step S14 in FIG. 11). Then, the obtained maximum ablation area data is stored in the ablation area data storage unit.

  The tip position information or the maximum ablation area data of the RFA puncture needle 15 obtained at this time is a predetermined display condition (that is, the tip of the RFA puncture needle 15 exists inside the ablation planning area, or all of the ablation planning area is If the maximum ablation area is included, the MPR image data generation unit 62 of the image data generation unit 6 includes, for example, the first MPR cross section including the center of the ablation planning area and the RFA puncture needle 15. And the second MPR cross section and the third MPR cross section perpendicular to the first MPR cross section are formed, and the volume data at the time of insertion of the puncture needle collected by the same procedure as step S3 in FIG. By setting the above-mentioned MPR cross section, MPR image data in each cross section is generated.

  Then, the treatment support data generation unit 11 adds the ablation plan area data read from the ablation area data storage unit of the ablation area data generation unit 8 to the MPR image data generated by the MPR image data generation unit 62 and the above-described maximum ablation area. The second treatment support data is generated by superimposing the data and displayed on the display unit 12 (step S15 in FIG. 11).

  On the other hand, when the above display conditions are not satisfied, the maximum ablation area data is not superimposed on the MPR image data, and the procedure from step S12 to step S14 is repeated.

  If the second treatment support data is displayed in step S15 described above, the puncture needle tip distance measurement unit 10 and the ablation plan area data supplied from the ablation area data storage unit of the ablation area data generation unit 8 and The tip position information of the RFA puncture needle 15 supplied from the puncture needle position information detection unit 7 is received, and the tip portion of the RFA puncture needle 15 inserted in or near the treatment target region and the ablation set at the time of ablation treatment planning. A distance (puncture needle tip distance) from the plan area or its center is measured (step S16 in FIG. 11). The measurement result of the puncture needle tip distance obtained at this time is added to the second treatment support data and displayed on the display unit 12.

  On the other hand, under the observation of the second treatment support data, the operator continues to insert the RFA puncture needle 15 until the above-mentioned puncture needle tip distance shows the minimum value, and the RFA puncture needle whose position has been updated is updated. The procedure from step S13 to step S16 is repeated for the 15 tip portions. Then, if the tip of the RFA puncture needle 15 is fixed at a position where the tip distance of the puncture needle is minimized, the ablation region data generation unit 8 can input the input unit based on the maximum ablation region data displayed on the display unit 12. In accordance with the ablation area setting instruction signal supplied from 13, the ablation area data is generated by reducing the maximum ablation area data read from its own ablation area data storage unit. Then, the obtained ablation area data is stored in the ablation area data storage unit (step S17 in FIG. 11).

  On the other hand, the ablation area evaluation unit 9 measures the volume, radius, diameter, and the like of the ablation plan area data and the ablation area data read from the ablation area data storage unit, and further, based on the measurement results, the ablation area Measure the shape ratio of the ablation area data to the data. Then, the quality of the ablation area relative to the ablation plan area is evaluated by comparing this shape ratio with a predetermined threshold value α (step S18 in FIG. 11).

  Next, the treatment support data generation unit 11 reads MPR image data generated by the MPR image data generation unit 62 based on the volume data at the time of puncture needle insertion from the ablation region data storage unit of the ablation region data generation unit 8. The ablation plan area data, the maximum ablation area data, and the ablation area data are superimposed, and further, the third treatment support data is generated by adding the evaluation result of the ablation area, the measurement result of the tip of the puncture needle, and the like. Then, the obtained third treatment support data is displayed on the display unit 12 (step S19 in FIG. 11).

  Next, the operator observes the positional relationship of the ablation area data with respect to the ablation plan area data indicated in the third treatment support data and the evaluation result of the ablation area, and if the sufficient evaluation result cannot be obtained, that is, If the insertion position and insertion direction of the RFA puncture needle 15 inserted into the patient's body are not desirable for the ablation plan area set at the time of the ablation treatment plan, after re-inserting the RFA puncture needle 15 (Step S20 in FIG. 11), the above-described Steps S13 to S19 are repeatedly executed.

  On the other hand, when a sufficient evaluation result is obtained, the ablation energy of the ablation treatment apparatus separately installed is set based on the size of the ablation area data indicated in the third treatment support data, and the patient's treatment target Begin cauterization treatment for the area.

  According to the present embodiment described above, when performing the ablation treatment using the RFA puncture needle for the treatment target region of the patient, the ablation plan region and the puncture needle stick set at the time of the ablation treatment plan for the treatment target region. By displaying the treatment support data (third treatment support data) indicating the ablation area by the RFA puncture needle with the distal end portion inserted in the treatment target area or the vicinity thereof at the time of entry, it is possible to safely and Efficient cauterization treatment can be supported.

  In particular, the ablation planning area data indicating the ablation planning area and the ablation area data indicating the ablation area are superimposed on MPR image data of a predetermined section generated based on the volume data of the patient collected at the time of insertion of the puncture needle. Thus, by generating the above-described treatment support data, it is possible to accurately grasp the position and shape of the ablation planning area and the ablation area with respect to the treatment target area.

  In addition, since the ablation area is set corresponding to the shape of the ablation planning area and the treatment target area, it is possible to cauterize all the lesions and prevent the damage to the normal tissue from expanding. In addition, the magnitude of the ablation energy supplied to the RFA puncture needle from a separately installed ablation treatment device can be set easily and accurately based on the magnitude of the ablation area data indicated in the above-mentioned treatment support data. it can.

  Further, it is possible to quantitatively evaluate the quality of the ablation area relative to the ablation area based on the shape ratio between the ablation area data and the ablation area data. If a good evaluation result cannot be obtained, RFA puncture Since the needle can be re-inserted immediately, not only efficient cauterization treatment is possible, but also the burden on the operator and patient can be reduced.

  As mentioned above, although embodiment of this indication has been described, this indication is not limited to the above-mentioned embodiment, and it can change and carry out. For example, in the above-described embodiment, the case where the RFA puncture needle 15 is used as the puncture needle for ablation treatment has been described, but ablation treatment may be performed on the treatment target region using another puncture needle for ablation treatment.

  Moreover, although the case where treatment support data is generated based on volume data collected by ultrasonic transmission / reception for the patient has been described, based on volume data collected by other imaging means such as X-ray imaging and MRI imaging. Treatment support data may be generated.

  Furthermore, the case where the treatment support data effective for the cauterization treatment is generated based on the volume data collected using the ultrasonic probe 2 in which a plurality of vibration elements are two-dimensionally arranged has been described. Treatment support data may be generated based on volume data collected by mechanically moving or rotating the one-dimensionally arranged ultrasonic probes. Moreover, although the above-mentioned volume data was generated based on the B mode data obtained by processing the reception signal from the ultrasonic probe 2, it was obtained by detecting the Doppler component of the reception signal. It may be generated based on other ultrasonic data such as color Doppler data.

  In addition, the ablation plan area, the maximum ablation area, and the ablation area are added to the three MPR image data generated in the first to third MPR sections in the volume data at the time of ablation treatment planning and puncture needle insertion. The first treatment support data to the third treatment support data are generated by superimposing the region data shown, but the MPR image data on which the region data is superimposed is not limited to three. For example, Each treatment support data may be generated by superimposing the above-described region data on the MPR image data generated in the first MPR section at the time of ablation treatment planning or at the time of insertion of the puncture needle.

  On the other hand, the ablation region data generation unit 8 in the above-described embodiment is suitable for ablation treatment of the treatment target region by performing reduction processing on preset maximum ablation region data based on an instruction signal supplied from the input unit 13. Although the case of generating ablation area data has been described, the reduction process for obtaining suitable ablation area data can also be performed automatically.

  Further, the case where the second treatment support data is generated by superimposing the maximum ablation area data and the ablation plan area data on the MPR image data has been described. Then, the second treatment support data may be generated. Further, the third treatment support data may be generated without superimposing the maximum ablation area data and the measurement result of the puncture needle tip distance. In addition, a new ablation energy calculation unit for calculating the ablation energy uniquely determined by the size of the ablation area data is provided, and the ablation energy value suitable for the ablation treatment calculated by the ablation energy calculation unit is provided. You may include and display in 3 treatment assistance data. The display of the ablation energy value makes it easier to set the ablation energy for the ablation treatment device.

  Furthermore, although the case where one ablation plan area and ablation area are set for one treatment target area existing in the patient's body has been described, in the case where a plurality of small treatment target areas exist close to each other, etc. An ablation plan area and an ablation area surrounding these treatment target areas may be set. By setting the ablation plan area and the ablation area, it becomes possible to perform ablation treatment on a plurality of treatment target areas substantially simultaneously, and the treatment efficiency is greatly improved.

  The ablation area evaluation unit 9 in the above-described embodiment measures the volume, radius, diameter, and the like of the ablation plan area data and the ablation area data, and further, ablation area data for the ablation plan area data based on these measurement results. The case where the ablation area is evaluated by comparing the shape ratio such as volume ratio, radius ratio, diameter ratio, etc. with a predetermined threshold value α has been described. The volume difference and radius difference of the ablation area data with respect to the ablation plan area data The above evaluation may be performed by comparing a shape difference such as a diameter difference with a predetermined threshold value.

  In the above-described embodiment, the maximum ablation area when a predetermined display condition is satisfied between the distal end position of the RFA puncture needle 15 and the ablation planning area or the maximum ablation area and the ablation planning area when the puncture needle is inserted. Although the case where data is displayed has been described, the maximum ablation area data is always displayed at the time of insertion of the puncture needle, and when the above display conditions are satisfied, the maximum ablation area data is displayed with different brightness and color tone. May be.

  Further, in the above-described embodiment, the case where the ablation area by the ablation treatment puncture needle is set based on the volume data collected at the time of insertion of the puncture needle has been described. However, the volume data is projected onto a predetermined projection plane. The above-described cautery region may be set based on the generated image data.

  Note that each unit included in the medical image diagnostic apparatus 100 of the present embodiment can be realized by using, for example, a computer including a CPU, a RAM, a magnetic storage device, an input device, a display device, and the like as hardware. it can. For example, the system control unit 14 that controls each unit of the medical image diagnostic apparatus 100 can realize various functions by causing a processor such as a CPU mounted on the computer to execute a predetermined control program. In this case, the above-described control program may be installed in advance in the computer, or may be stored in a computer-readable storage medium or installed in the computer of the control program distributed via the network. .

  Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

2 ... Ultrasonic probe 21 ... Puncture adapter 3 ... Transmission / reception unit 31 ... Transmission unit 32 ... Reception unit 4 ... Reception signal processing unit 5 ... Volume data generation unit 6 ... Image data generation unit 7 ... Puncture needle position information detection unit 8 ... Ablation area data generation unit 9 ... ablation area evaluation unit 10 ... puncture needle tip distance measurement unit 11 ... treatment support data generation unit 12 ... display unit 13 ... input unit 14 ... system control unit 15 ... RFA puncture needle 151 ... handpiece 152 ... Deployment needle 153 ... Position sensor 154 ... Lead wire 100 ... Medical image diagnostic apparatus

Claims (12)

In a medical image diagnostic apparatus for supporting ablation treatment of a treatment target region based on volume data collected from a three-dimensional region including a treatment target region of a patient,
Ablation plan area setting means for setting an ablation plan area for the treatment target area based on volume data collected at the time of ablation treatment planning;
Ablation area setting means for setting an ablation area by a puncture needle for ablation treatment based on volume data collected at the time of puncture needle insertion or image data generated by projecting the volume data onto a predetermined projection plane;
Treatment support data generating means for generating treatment support data by superimposing the ablation plan area data indicating the ablation plan area and the ablation area data indicating the ablation area on the image data generated based on the volume data;
A medical image diagnostic apparatus comprising: display means for displaying the treatment support data.   Ablation area evaluation means for evaluating the quality of the ablation area relative to the ablation area based on a shape ratio or a shape difference between the ablation area data and the ablation area data, and the treatment support data generation means includes the ablation plan The medical image diagnosis apparatus according to claim 1, wherein the treatment support data is generated by adding an evaluation result of the ablation area to the image data on which the area data and the ablation area data are superimposed.   The ablation area evaluation means evaluates the quality of the ablation area relative to the ablation area based on a comparison result between a shape ratio or shape difference between the ablation area data and the ablation area data and a predetermined threshold value. The medical image diagnostic apparatus according to claim 2.   A puncture needle position information detecting means for detecting tip position information of the puncture needle for ablation treatment; and ablation area data generation means for generating the ablation area data, wherein the ablation area data generation means includes the tip position information and the ablation. The ablation area data corresponding to the ablation plan area data is generated by reducing the maximum ablation area data of a predetermined shape generated based on the ablation ability of the therapeutic puncture needle. Medical diagnostic imaging device.   5. The medical image diagnosis according to claim 4, wherein the ablation area data generation unit generates the ablation area data by reducing the maximum ablation area data generated so as to surround the ablation plan area data. apparatus.   A puncture needle tip distance measuring unit that measures a distance between the tip of the puncture needle for ablation treatment and the ablation planning region data or the center thereof as a puncture needle tip distance; and the ablation region data generation unit includes the puncture needle tip The ablation area data is generated by reducing the maximum ablation area data generated around the tip of the ablation puncture needle inserted at a position where the distance measurement value is minimized. The medical image diagnostic apparatus according to claim 4.   When the distal end portion of the puncture needle for ablation treatment is present inside the ablation planning area, or when all of the ablation planning area is included in the maximum ablation area, the display means includes at least the image data in the image data The medical image diagnosis apparatus according to claim 4, wherein the treatment support data generated by superposing the ablation plan area data and the maximum ablation area data is displayed.   When the distal end portion of the ablation treatment puncture needle is present inside the ablation planning area, or when all of the ablation planning area is included in the maximum ablation area, the display means is superimposed on the image data. 5. The medical image diagnostic apparatus according to claim 4, wherein the maximum ablation area data is displayed with different brightness or color tone.   The puncture needle position information detecting means detects tip position information of the ablation treatment puncture needle based on a position signal supplied from a position sensor provided at the tip of the ablation treatment puncture needle. The medical image diagnostic apparatus according to claim 4.   Image data generating means for generating MPR image data of a predetermined cross section based on the volume data is provided, and the ablation area data generation means superimposes the ablation plan area data and the ablation area data on the MPR image data. The medical image diagnosis apparatus according to claim 1, wherein the treatment support data is generated.   It comprises ablation energy calculation means for calculating ablation energy necessary for ablation treatment of the treatment area based on the size of the ablation area data, and the treatment support data generation means obtains the calculation result of the ablation energy as the image data. The medical image diagnostic apparatus according to claim 1, wherein the treatment support data is generated by adding to the medical image data. For a medical image diagnostic apparatus that supports ablation treatment of a treatment target region based on volume data collected from a three-dimensional region including a treatment target region of a patient,
An ablation plan area setting function for setting an ablation plan area for the treatment target area based on volume data collected at the time of ablation treatment planning;
Ablation area setting function for setting an ablation area by a puncture needle for ablation treatment based on volume data collected at the time of puncture needle insertion;
Ablation area evaluation function for evaluating the quality of the ablation area relative to the ablation area based on a shape ratio or a shape difference between the ablation area and the ablation area; and
Treatment support data is generated by superimposing the ablation planning area data indicating the ablation planning area and the ablation area data indicating the ablation area on the image data generated based on the volume data, and adding the evaluation result of the ablation area. Treatment support data generation function,
A control program for executing a display function for displaying the treatment support data.

Images