JP6320726B2 - Medical device and integrated dose display system - Google Patents

Description

The present embodiment as one aspect of the present invention relates to a medical apparatus and an integrated dose display system that display an irradiation dose of a subject.

  Currently, an increase in radiation exposure due to radiographic examinations is seen as a problem mainly in the United States and Europe, and reduction of patient exposure has become an issue for customers. The total exposure dose for Americans has increased sixfold compared to 1980. The American Society of Medical Physics has warned physicians not to perform unnecessary radiographic imaging. In addition, education is being promoted for laboratory technicians in the United States to conduct examinations at lower doses.

  Doctors and engineers set examination conditions in consideration of the patient's past and future exposure doses in order to minimize the effects of patient exposure. For example, if the patient has been exposed to a large amount during the previous examination and not much time has passed since the last examination, doctors and technicians will perform a low-exposure examination to minimize radiation damage to the patient. Want to.

  Systems have been developed to visualize the radiation dose to the patient under examination / treatment. This system displays in real time the integrated irradiation dose (first integrated dose) in one examination / treatment for a patient during examination / treatment.

JP 2012-130436 A

  In the system for visualizing the irradiation dose for the patient under examination / treatment, a model (patient model) expressing the human body as a 3D model for mapping the first integrated dose is set immediately before the examination / treatment. The setting is based on the selection of the model according to the patient's body type (height, weight), but since the patient's body type changes with time, different models may be selected for multiple examinations / multiple treatments. . When the cumulative irradiation dose (second cumulative dose) over multiple examinations / multiple treatments is calculated in different models, misalignment occurs between the models, and the accurate second cumulative dose is calculated and displayed. Can not do it. If the accurate second cumulative dose is not calculated and displayed, the operator may mistake the second cumulative dose at the time of examination planning / treatment planning, resulting in skin burns due to local exposure to the patient.

  In addition, model setting may be based on selection of a model by an operator. In that case, even when the patient's body shape does not change with time, different models may be selected for multiple examinations / multiple treatments.

  Furthermore, the system for visualizing the irradiation dose for the patient under examination / treatment assumes that the integration unit for obtaining the first integrated dose is 1 inspection / 1 treatment, but obtains the first integrated dose. It is also conceivable that the integration unit for this is one part of examination / one part of treatment or multiple examinations / multiple treatments. For example, in the latter case, an integrated irradiation dose in a plurality of examinations / multiple treatments becomes a first integrated dose, and an integrated irradiation dose over a plurality of first integrated doses becomes a second integrated dose. Also in these cases, if the models are different among the plurality of first accumulated doses, a positional shift occurs between the models, and the accurate second accumulated dose cannot be calculated and displayed.

The medical device of the present embodiment, in order to solve the above problems, Ru with a cumulative dose display system and irradiation apparatus. The medical device includes a model setting unit, a first calculation unit, and a second calculation unit. The model setting means sets a required model from a plurality of models expressing a human body as a 3D model having a different shape . The first calculation means obtains a first integrated dose distribution indicating a dose distribution in the body surface of the required model based on radiation irradiation conditions, and registers the first integrated dose distribution in a storage unit . The second calculation means integrates the plurality of first accumulated dose distributions acquired from the storage unit to obtain a second accumulated dose distribution indicating the dose distribution on the body surface of the required model . In addition, when the plurality of first accumulated dose distributions acquired from the storage unit correspond to a plurality of required models, the second calculation unit converts each of the plurality of required models into a standard model. , Obtaining a plurality of third integrated dose distributions indicating dose distributions on the body surface of the standard model, integrating the plurality of third integrated dose distributions, and indicating a dose distribution on the body surface of the standard model; A distribution is obtained, and the standard model is inversely transformed into one of the plurality of required models, and the dose distribution after the fourth accumulated dose distribution is inversely transformed according to the inverse transformation is used as the second accumulated value. Calculated and displayed as dose distribution.

Schematic which shows the structure of the medical device which has a dose management function of 1st Embodiment. The block diagram which shows the function of the medical device which has a dose management function of 1st Embodiment. The figure which shows the example of the some model stored in model DB. The figure which shows the example of the model setting screen for setting 1 model. The figure which shows the example of the model setting screen for setting 1 model. The figure which shows the example of the model setting screen for setting 1 model. The figure which shows an example of the data of 1st integrated dose distribution. The figure for demonstrating the detail of 1st integrated dose distribution. (A)-(C) are the figures for demonstrating the 1st example of a display of 2nd accumulated dose distribution. (A)-(C) are the figures for demonstrating the 2nd example of a display of 2nd accumulated dose distribution. (A)-(C) are the figures for demonstrating the 3rd example of a display of 2nd accumulated dose distribution. The flowchart which shows operation | movement of the medical device which has a dose management function of 1st Embodiment. The flowchart which shows operation | movement of the medical device which has a dose management function of 1st Embodiment. Schematic which shows the structure of the medical device which has a dose management function of 2nd Embodiment. The block diagram which shows the function of the medical device which has a dose management function of 2nd Embodiment. (A)-(D) is a figure for demonstrating the alignment using an anatomical landmark.

A medical device and an integrated dose display system of this embodiment will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a schematic diagram illustrating a configuration of a medical apparatus having a dose management function according to the first embodiment.

FIG. 1 shows a medical device 100 having a dose management function of the first embodiment, and the medical device 100 is provided with an integrated dose display system 1 and a general-purpose radiation irradiation device 50. Examples of the radiation irradiation apparatus 50 include a radiation diagnostic apparatus (radiation inspection apparatus) such as an X-ray diagnostic apparatus and an X-ray CT (computed tomography) apparatus, and a radiotherapy apparatus such as a gamma knife .

  The integrated dose display system 1 has a configuration as a general computer. The integrated dose display system 1 is basically composed of a CPU (central processing unit) 11 as a control device, a memory 12, an HDD (hard disc drive) 13, an IF (interface) 14, an input unit 15, a display unit 16, and the like. It comprises a typical hardware, a model DB 17 and a first integrated dose distribution DB 18. The CPU 11 is interconnected to each hardware component constituting the integrated dose display system 1 via a bus as a common signal transmission path.

  The CPU 11 is a control device having a configuration of an integrated circuit (LSI) in which an electronic circuit made of a semiconductor is enclosed in a package having a plurality of terminals. The CPU 11 executes a program stored in the memory 12. Alternatively, the CPU 11 has a function of loading a program stored in the HDD 13, a program transferred from the network N, received by the IF 14 and installed in the HDD 13 into the memory 12 and executing the program.

  The memory 12 is a storage device including a read only memory (ROM) and a random access memory (RAM). The memory 12 has a function of storing an initial program loading (IPL), a basic input / output system (BIOS) and data, and a work memory of the CPU 11 and a temporary storage of data.

  The HDD 13 is a storage device having a configuration in which a metal disk coated or vapor-deposited with a magnetic material is incorporated in a reading device (not shown) in a non-detachable manner. The HDD 13 has a function of storing a program (including an OS (operating system) in addition to an application program) installed in the integrated dose display system 1 and various data.

  The IF 14 is configured by a connector that conforms to a parallel connection specification or a serial connection specification. The IF 14 has a function of performing communication control according to each standard and connecting to the network N, thereby connecting the integrated dose display system 1 to the network N network.

  The input unit 15 includes a keyboard and a mouse that can be operated by an operator. An input signal according to the operation of the input unit 15 is sent to the CPU 11 via the bus.

  The display unit 16 includes a D / A (digital to analog) conversion circuit and a monitor (not shown). The display unit 16 displays a second cumulative dose distribution and the like which will be described later.

  The model DB 17 includes an HDD and a memory, and stores a plurality of models (patient models) expressing the human body as a 3D model. The model DB 17 stores a plurality of models (shown in FIG. 3) corresponding to the combination of the height and weight of the patient (subject). The model DB 17 may store a plurality of models corresponding to combinations of age, sex, and the like with the patient's height and weight.

  The first integrated dose distribution DB 18 is constituted by an HDD or a memory, and stores three-dimensional first integrated dose distribution data accompanied by patient identification information (patient ID) for identifying a patient (shown in FIG. 7).

  The radiation irradiation apparatus 50 has a configuration as a general computer. The radiation irradiation apparatus 50 is mainly composed of a basic hardware such as a CPU 51 as a control device, a memory 52, an HDD 53, an IF 54, an input unit 55, a display unit 56, and the like, and a radiation irradiation unit 57. The CPU 51 is interconnected to each hardware component constituting the radiation irradiation apparatus 50 via a bus as a common signal transmission path.

  The CPU 51 has the same configuration as the CPU 11 of the integrated dose display system 1. The CPU 51 executes a program stored in the memory 52. Alternatively, the CPU 51 has a function of loading a program stored in the HDD 53, a program transferred from the network N and received by the IF 54 and installed in the HDD 53 into the memory 52 and executing the program. At the time of examination / treatment, the CPU 51 controls the operation of the radiation irradiating unit 57 to irradiate radiation, or generates image data from data based on radiation sent from the radiation irradiating unit 57.

  The memory 52 has the same configuration as the memory 12 of the integrated dose display system 1. The memory 52 has a function of storing IPL, BIOS, and data, and using the work memory of the CPU 51 and temporary storage of data.

  The HDD 53 has the same configuration as the HDD 13 of the integrated dose display system 1. The HDD 53 has a function of storing a program installed in the radiation irradiation apparatus 50 (including an OS in addition to the application program) and various data.

  The IF 54 has the same configuration as the IF 14 of the integrated dose display system 1. The IF 54 has a function of performing communication control according to each standard and connecting to the network N, thereby connecting the radiation irradiation apparatus 50 to the network N network.

  The input unit 55 has the same configuration as the input unit 15 of the integrated dose display system 1. An input signal according to the operation of the input unit 55 is sent to the CPU 51 through the bus.

  The display unit 56 has the same configuration as the display unit 16 of the integrated dose display system 1. The display unit 56 displays image data and the like generated by the CPU 51.

  The radiation irradiation unit 57 is a device that irradiates a patient with radiation. Here, when the radiation irradiation apparatus 50 is an X-ray diagnostic apparatus, the radiation irradiation unit 57 includes a general configuration such as an imaging system, that is, a high voltage generation unit, an X-ray source, an X-ray detector, and a bed. . When the radiation irradiation apparatus 50 is an X-ray CT apparatus, the radiation irradiation unit 57 has a general configuration such as an imaging system, that is, a high voltage generation unit, an X-ray source, an X-ray detector, a rotation unit, and a bed (not shown). including. When the radiation irradiation apparatus 50 is a radiation therapy apparatus, the radiation irradiation unit 57 includes general configurations such as a high voltage generation unit, a radiation source, a rotation unit, and a bed (not shown).

  FIG. 2 is a block diagram illustrating functions of the medical device 100 having a dose management function according to the first embodiment.

  When the CPU 11 of the integrated dose display system 1 constituting the medical device 100 of the first embodiment executes the program, the CPU 11 operates the operation support means 11a, the patient information setting means 11b, the model setting means 11c, and the first integrated dose reception. It functions as means 11d, first integrated dose distribution registration means 11e, patient identification information setting means 11f, first integrated dose distribution acquisition means 11g, and second integrated dose distribution calculation means 11h. Although the means 11a to 11h are described as functioning as software, all or part of the means 11a to 11h may be provided in the integrated dose display system 1 as hardware.

  The operation support unit 11a is an interface such as a GUI (Graphical User Interface) that mediates the units 11b to 11h, the input unit 15, and the display unit 16.

  Prior to one examination / one treatment, the patient information setting unit 11b receives patient information based on an input from the input unit 15 via the operation support unit 11a or an input from the radiation irradiation device 50 via the network N. It has a function of setting (subject information). The patient information includes patient identification information (patient ID) for identifying the patient, and the height and weight of the patient. The patient information may include the sex and age of the patient.

  The model setting unit 11c has a function of setting one model from a plurality of three-dimensional models stored in the model DB 17 in accordance with the patient information set by the patient information setting unit 11b prior to one examination / one treatment. Have.

  FIG. 3 is a diagram illustrating an example of a plurality of models stored in the model DB 17.

  As shown in FIG. 3, the model DB 17 (shown in FIG. 2) includes a model No. and a combination of height (Height) and weight (Weight) for a model type T1 that simulates a human body with a hand lowered. Model data associated with the three-dimensional model is stored. In the model DB 17 (shown in FIG. 2), for the model type T2 that simulates the human body with the hand raised, the combination of the height and the weight is associated with the model number and the three-dimensional model. Model data is stored. Further, in the model DB 17 (illustrated in FIG. 2), for the model type T3 that simulates the human body with the hand omitted, the combination of the height and the weight is associated with the model number and the three-dimensional model. Model data is stored.

  4 to 6 are diagrams illustrating examples of model setting screens for setting one model.

  FIG. 4 shows a case where the model type T1 is selected from the plurality of model types T1 to T3 shown in FIG. 3 stored in the model DB 17 (shown in FIG. 2). A model setting screen for setting the model is shown. The model setting screen shown in FIG. 4 includes 12 model numbers corresponding to combinations of three types of heights “H1” to “H3” and four types of weights “W1” to “W4”. 1 to 12 are listed as options.

  FIG. 5 shows a case where the model type T2 is selected from the plurality of model types T1 to T3 shown in FIG. 3 stored in the model DB 17 (shown in FIG. 2). A model setting screen for setting the model is shown. The model setting screen shown in FIG. 5 includes 12 model numbers corresponding to combinations of three types of heights “H1” to “H3” and four types of weights “W1” to “W4”. 13-24 are listed as options.

  FIG. 6 shows the case where the model type T3 is selected from the plurality of model types T1 to T3 shown in FIG. 3 stored in the model DB 17 (shown in FIG. 2). A model setting screen for setting the model is shown. The model setting screen shown in FIG. 6 includes 12 model numbers corresponding to combinations of three types of heights “H1” to “H3” and four types of weights “W1” to “W4”. 25-36 is an option.

  Here, consider a case where only one model type shown in FIG. 3, for example, model type T1, is stored in the model DB 17 (shown in FIG. 2). The twelve model numbers shown in FIG. 1 to 12, one model (model No.) corresponding to the combination of height and weight included in the patient information set by the patient information setting unit 11 b (shown in FIG. 2) is automatically selected and set. (Automatic setting). Alternatively, the twelve model numbers shown in FIG. 1 to 12, one model (model No) corresponding to the combination of height and weight included in the patient information set by the patient information setting means 11b (shown in FIG. 2) is automatically selected and selected. One model is changed and set by the operator as necessary (semi-automatic setting). Alternatively, the twelve model numbers shown in FIG. 1 to 12, one model (model No) is selected and set by the operator according to the combination of height and weight included in the patient information set by the patient information setting means 11b (shown in FIG. 2). (Manual setting).

  Next, consider a case where a plurality of model types shown in FIG. 3, for example, three model types T1 to T3 are stored in the model DB 17 (shown in FIG. 2). One model type, for example, the model type T1 shown in FIG. 4, is selected by the operator from the three model types T1 to T3 shown in FIGS. The 12 model numbers shown in FIG. 1 to 12, one model (model No.) corresponding to the combination of height and weight included in the patient information set by the patient information setting unit 11 b (shown in FIG. 2) is automatically selected and set. (Automatic setting). Alternatively, the twelve model numbers shown in FIG. 1 to 12, one model (model No) corresponding to the combination of height and weight included in the patient information set by the patient information setting means 11b (shown in FIG. 2) is automatically selected and selected. One model is changed and set by the operator as necessary (semi-automatic setting). Alternatively, the twelve model numbers shown in FIG. 1 to 12, one model (model No) is selected and set by the operator according to the combination of height and weight included in the patient information set by the patient information setting means 11b (shown in FIG. 2). (Manual setting).

  Returning to the description of FIG. 2, the first integrated dose receiving means 11 d is a patient set by the patient information setting means 11 b from the radiation irradiation apparatus 50 via the IF 14 after the examination / treatment using the radiation irradiation apparatus 50. It has a function of receiving data of integrated irradiation dose (first integrated dose) for each body surface position (three-dimensional position) of the patient based on radiation irradiation conditions for the patient corresponding to the information. The first integrated dose is an integrated unit, for example, an integrated irradiation dose in one examination / one treatment, one part of examination / one part of treatment, or multiple examinations / multiple treatments. Hereinafter, a case where the integration unit is 1 examination / 1 treatment will be described as an example.

  The first integrated dose distribution registration unit 11e obtains the first integrated dose for each position of the real coordinate system received by the receiving unit 11d after the examination / treatment using the radiation irradiation apparatus 50, and the first integrated dose distribution for each position of the model coordinate system. It has a function to convert coordinates to one accumulated dose. Further, the first integrated dose distribution registration unit 11e is a three-dimensional first unit that associates the first integrated dose after coordinate conversion for each body surface position (three-dimensional position) of the model set by the model setting unit 11c. The integrated dose distribution data is generated, and patient identification information is attached to the first integrated dose distribution and registered in the first integrated dose distribution DB 18.

  FIG. 7 is a diagram illustrating an example of data of the first integrated dose distribution.

  As shown in FIG. 7, the first integrated dose distribution DB 18 (shown in FIG. 2) stores a first integrated dose distribution in which the first integrated dose in the model coordinate system is associated with each body surface position of the model. The Each first integrated dose distribution is accompanied by patient identification information included in the patient information. Note that FIG. 7 shows a case where the first integrated dose distribution in which the first integrated dose is mapped to the body surface position of the model is stored, but the model data and the first integrated dose for each body surface position are stored. It may be a separate one.

  FIG. 8 is a diagram for explaining the details of the first cumulative dose distribution.

  As shown in FIG. 8, the first cumulative dose distribution of the model coordinate system is based on the first cumulative dose at each body surface position of the body surface positions (points) Q1 to Q6 of the model. The body surface positions Q1 to Q6 have information on (X coordinate, Y coordinate, Z coordinate, first integrated dose (mGy)). Here, the X coordinate is the left-right direction of the patient, the Y coordinate is the vertical direction of the patient, and the Z coordinate is the body axis direction of the patient. The first integrated dose at each body surface position may be stored separately from the model or may be stored together. When there is no irradiation dose (body surface positions Q1 to Q6), the first cumulative dose is 0 mGy.

  Returning to the description of FIG. 2, the patient identification information setting unit 11 f is based on the input from the input unit 15 via the operation support unit 11 a, and the patient identification information (patient ID) of the patient whose second integrated dose is to be displayed. Has the function of setting.

  The first integrated dose distribution acquisition unit 11g acquires a plurality of past three-dimensional first integrated dose distributions corresponding to the patient identification information set by the patient identification information setting unit 11f from the first integrated dose distribution DB 18 ( Read) function.

  The second integrated dose distribution calculation unit 11h integrates (sums) a plurality of first integrated doses for each body surface position based on the plurality of first integrated dose distributions acquired by the first integrated dose distribution acquisition unit 11g. And a function of calculating data of a three-dimensional second integrated dose distribution over a plurality of examinations / multiple treatments (a plurality of integration units). The second integrated dose distribution calculating unit 11h renders the three-dimensional second integrated dose distribution to generate a two-dimensional second integrated dose distribution, and displays it on the display unit 16 via the operation support unit 11a. It has a function.

  9A to 9C are diagrams for explaining a first display example of the second cumulative dose distribution.

  FIG. 9A shows a first first integrated dose distribution (mapping) corresponding to the patient identification information P1 shown in FIG. FIG. 9B shows a second first integrated dose distribution (mapping) corresponding to the patient identification information P1 shown in FIG. FIG. 9C shows a display example of the second integrated dose distribution (mapping) based on the two first integrated dose distributions of FIGS. 9A and 9B.

  The model used for the first first integrated dose distribution shown in FIG. 9A is model No. corresponding to the model type T1. 8. Similarly, the model used for the second first integrated dose distribution shown in FIG. 9B is model No. corresponding to the model type T1. 8. That is, the first used integrated dose distribution and the second first integrated dose distribution share a common model.

  In the case shown in FIGS. 9A and 9B, the model is model no. 8, the plurality of body surface positions in the first first accumulated dose distribution shown in FIG. 9A and the plurality of body surface positions in the second first accumulated dose distribution shown in FIG. 9B. And each match. In this case, the positions of the first first integrated dose distribution shown in FIG. 9A and the second first integrated dose distribution shown in FIG. A two-dimensional second integrated dose distribution for display shown in FIG. 9C is calculated by integrating (parallel projection) the first integrated dose in the second first integrated dose distribution in the viewing direction of the display. . Alternatively, the positions of the first first accumulated dose distribution shown in FIG. 9A and the second first accumulated dose distribution shown in FIG. The two-dimensional second integrated dose distribution for display shown in FIG. 9C is calculated by integrating the first integrated dose at the same position in the two first integrated dose distributions and then performing two-dimensional projection.

  Although the method for calculating the second cumulative dose distribution from the two first cumulative dose distributions with the same model is shown using FIGS. 9A to 9C, three or more first cumulative dose distributions are shown. The same applies to the calculation of the second cumulative dose distribution from the above.

  10A to 10C are diagrams for explaining a second display example of the second cumulative dose distribution.

  FIG. 10A shows a first first integrated dose distribution (mapping) corresponding to the patient identification information P2 shown in FIG. FIG. 10B shows a second first integrated dose distribution (mapping) corresponding to the patient identification information P2 shown in FIG. FIG. 10C shows a display example of the second integrated dose distribution (mapping) based on the two first integrated dose distributions of FIGS. 10A and 10B.

  The model used for the first first integrated dose distribution shown in FIG. 10A is model No. corresponding to model type T2. 13. On the other hand, the model used for the second first integrated dose distribution shown in FIG. 10B is model No. corresponding to the model type T1. 1. That is, the model used for the first first integrated dose distribution and the second first integrated dose distribution is not common, but the patient's body shape (model body shape) is not changed.

  In the case shown in FIGS. 10A and 10B, since the models are not common, a plurality of body surface positions in the first first integrated dose distribution shown in FIG. 10A and the first position shown in FIG. The plurality of body surface positions in the first cumulative dose distribution of 2 do not match. In this case, the positions of the first first accumulated dose distribution shown in FIG. 10A and the second first accumulated dose distribution shown in FIG. A two-dimensional second integrated dose distribution for display shown in FIG. 10C is calculated by integrating (parallel projection) the first integrated dose in the second first integrated dose distribution in the viewing direction of the display. .

  Here, in the display example of FIG. 10C, the model No. used for the first first integrated dose distribution shown in FIG. 13 and the model No. used for the second first integrated dose distribution shown in FIG. It is preferable that one model can be visually distinguished. Therefore, in the display example of FIG. 10C, for example, the outer shape of the model used for the first first cumulative dose distribution is a broken line, and the outer shape of the model used for the second first cumulative dose distribution is a solid line. Indicated.

  10A to 10C, a method for calculating the second integrated dose distribution from two first integrated dose distributions that do not share a model but do not change the patient's body shape (model body shape). However, the same applies to the case where the second cumulative dose distribution is calculated from three or more first cumulative dose distributions.

  FIGS. 11A to 11C are diagrams for explaining a third display example of the second cumulative dose distribution.

  FIG. 11A shows a first first integrated dose distribution (mapping) corresponding to the patient identification information P3 shown in FIG. FIG. 11B shows a second first integrated dose distribution (mapping) corresponding to the patient identification information P3 shown in FIG. FIG. 11C shows a display example of the second integrated dose distribution (mapping) based on the two first integrated dose distributions of FIGS. 11A and 11B.

  The model used for the first first integrated dose distribution shown in FIG. 11A is model No. corresponding to model type T2. 15. On the other hand, the model used for the second first integrated dose distribution shown in FIG. 11B is model No. corresponding to the model type T3. 25. In other words, the models used for the first first integrated dose distribution and the second first integrated dose distribution are not common, and the patient's body shape (model body shape) changes.

  In the case shown in FIGS. 11A and 11B, since the models are not common, the plurality of body surface positions in the first first integrated dose distribution shown in FIG. 11A and the first position shown in FIG. The plurality of body surface positions in the first cumulative dose distribution of 2 do not match. In this case, the positions of the first first integrated dose distribution shown in FIG. 11A and the second first integrated dose distribution shown in FIG. By integrating (parallel projection) the first integrated dose in the second first integrated dose distribution in the viewing direction of the display, a two-dimensional second integrated dose distribution for display shown in FIG. 11C is calculated. .

  Here, in the display example of FIG. 11C, the model No. used for the first first integrated dose distribution shown in FIG. 15 and the model No. used in the second first integrated dose distribution shown in FIG. Preferably, the 25 models can be visually distinguished. Therefore, in the display example of FIG. 11C, for example, the outer shape of the model used for the first first cumulative dose distribution is a broken line, and the outer shape of the model used for the second first cumulative dose distribution is a solid line. Indicated.

  11A to 11C, the second integrated dose distribution is obtained from the two first integrated dose distributions in which the model is not common and the patient's body shape (model body shape) is changing. Although the calculation method is shown, the same applies to the case where the second cumulative dose distribution is calculated from three or more first cumulative dose distributions.

  In addition, the medical device 100 includes a computer (notebook PC) to which the second cumulative dose distribution calculated by the second cumulative dose distribution calculating unit 11h (shown in FIG. 2) is connected via the network N (shown in FIG. 1). Or the like).

  Subsequently, the operation of the medical device 100 having the dose management function of the first embodiment will be described with reference to FIGS. 1, 12, and 13.

  12 and 13 are flowcharts showing the operation of the medical device 100 having the dose management function of the first embodiment.

  1 and FIG. 12, the medical device 100 sets patient information (subject information) based on an input from the input unit 15 prior to examination / treatment (step ST1). Prior to the examination / treatment, the medical device 100 sets one model from a plurality of three-dimensional models stored in the model DB 17 in accordance with the patient information set in step ST1 (step ST2). The model setting method in step ST2 has been described with reference to FIGS.

  Next, after the examination / treatment, the medical device 100 receives data of the first integrated dose for each body surface position corresponding to the patient information set in step ST1 from the radiation irradiation device 50 via the IF 14. (Step ST3). After the examination / treatment, the medical device 100 compares the first integrated dose distribution data received in step ST3 with the three-dimensional first integrated dose distribution data (for each body surface position of the model set in step ST2). (Shown in FIG. 7) is generated (step ST4), and patient identification information is added to the first integrated dose distribution and registered in the first integrated dose distribution DB 18 (step ST5). By repeating the registration of the first cumulative dose distribution in step ST5, a plurality of past first cumulative dose distributions corresponding to each patient are stored in the first cumulative dose distribution DB 18 for a plurality of patients. .

  1 and FIG. 13, the medical device 100 sets patient identification information (patient ID) based on the input from the input unit 15 (step ST6). The medical device 100 acquires a plurality of three-dimensional first integrated dose distributions corresponding to the patient identification information set in step ST6 from the first integrated dose distribution DB 18 (step ST7).

  Next, the medical device 100 integrates a plurality of first integrated doses for each body surface position based on the plurality of first integrated dose distributions acquired in step ST7, and performs a three-dimensional first over a plurality of examinations / multiple treatments. 2 Calculate the integrated dose distribution (step ST8). Further, the medical device 100 renders the three-dimensional second integrated dose distribution calculated in step ST8 to generate a two-dimensional second integrated dose distribution and displays it on the display unit 16 (step ST9). The display method and display example in step ST9 have been described with reference to FIGS.

  As described above, according to the medical device 100 having the dose management function of the first embodiment, different models can be selected between a plurality of integration units (for example, between a plurality of examinations and a plurality of treatments). Even in this case, the second integrated dose of radiation can be displayed accurately and accurately while indicating that a different model is used. Thereby, according to the medical device 100 having the dose management function of the first embodiment, an operator such as a doctor or an engineer can radiate radiation to the patient from any direction in order to avoid local exposure at the time of patient examination planning / treatment planning. Since it can be determined whether to irradiate, local exposure to a patient can be reduced. In addition, according to the medical device 100 having the dose management function of the first embodiment, the operator can review whether or not the radiation application method (direction) in the examination / treatment of himself or others is appropriate. .

(Second Embodiment)
FIG. 14 is a schematic diagram illustrating a configuration of a medical apparatus having a dose management function according to the second embodiment.

  FIG. 14 shows a medical device 100A having a dose management function of the second embodiment, and the medical device 100A is provided with a radiation irradiation device 60. Examples of the radiation irradiation device 60 include a radiation diagnostic device such as an X-ray diagnostic device and an X-ray CT device, and a radiation therapy device such as a gamma camera. The radiation irradiation apparatus 60 has a configuration as a general computer. The radiation irradiation apparatus 60 mainly includes basic hardware such as a CPU 51, a memory 52, an HDD 53, an IF 54, an input unit 55, and a display unit 56 as a control device, a model DB 17, a first integrated dose distribution DB 18, and It is comprised from the radiation irradiation part 57. FIG. The CPU 51 is interconnected to each hardware component constituting the radiation irradiation apparatus 50 via a bus as a common signal transmission path.

  In the medical device 100A shown in FIG. 14, the same members as those in the medical device 100 shown in FIG.

  FIG. 15 is a block diagram illustrating functions of the medical device 100A having a dose management function according to the second embodiment.

  When the CPU 51 of the radiation irradiation apparatus 60 constituting the medical apparatus 100A of the second embodiment executes the program, the CPU 51 operates the operation support means 11a ′, the patient information setting means 11b, the model setting means 11c, and the first integrated dose distribution. It functions as registration means 11e ', patient identification information setting means 11f, first integrated dose distribution acquisition means 11g, and second integrated dose distribution calculation means 11h. In addition, although the means 11a'-11c, 11e'-11h is demonstrated as what functions as software, all or one part of the means 11a'-11c, 11e'-11h is provided in the radiation irradiation apparatus 60 as hardware. It may be a thing.

  In the medical device 100A shown in FIG. 15, the same members as those in the medical device 100 shown in FIG.

  The operation support unit 11a ′ is an interface such as a GUI that mediates the units 11b to 11c and 11e ′ to 11h, the input unit 55, and the display unit 56.

  After the examination / treatment, the first integrated dose distribution registration unit 11e ′ stores the first patient dose corresponding to the patient information set by the patient information setting unit 11b for each body surface position of the model set by the model setting unit 11c. It has a function of generating data of a first integrated dose distribution associated with one integrated dose, adding patient identification information to the first integrated dose distribution and registering it in the first integrated dose distribution DB 18.

  Note that the medical apparatus 100A has a computer (notebook PC) to which the second integrated dose distribution calculated by the second integrated dose distribution calculating unit 11h (shown in FIG. 15) is connected via the network N (shown in FIG. 14). Or the like).

  The operation of the medical device 100A according to the first embodiment is similar to the operation of the medical device 100 shown in the flowcharts of FIGS. In the operation of the medical device 100 shown in FIGS. 12 and 13, the integrated dose display system 1 is mainly used, but in the operation of the medical device 100 </ b> A, the radiation irradiation device 60 is mainly used.

  As described above, according to the medical device 100A having the dose management function of the second embodiment, different models can be selected between a plurality of integration units (for example, between a plurality of examinations and a plurality of treatments). Even in this case, the second integrated dose of radiation can be displayed accurately and accurately while indicating that a different model is used. Thus, according to the medical device 100A having the dose management function of the second embodiment, an operator such as a doctor or an engineer can radiate radiation to the patient from any direction in order to avoid local exposure at the time of patient examination planning / treatment planning. Since it can be determined whether to irradiate, local exposure to a patient can be reduced. Further, according to the medical device 100A having the dose management function of the second embodiment, the operator can review whether or not the radiation application method (direction) in the examination / treatment of the person or the other person is appropriate. .

(First modification)
In the medical device 100 shown in FIG. 2 or the medical device 100A shown in FIG. 15, the second integrated dose distribution calculating unit 11h includes a plurality of different first integrated dose distributions acquired by the first integrated dose distribution acquiring unit 11g. When including models (first model and second model), the anatomical landmarks in the first model are aligned with the anatomical landmarks in the second model. Then, the second integrated dose distribution calculating unit 11h integrates the first integrated dose distribution after alignment and the first integrated dose distribution according to the second model for each body surface position.

  FIGS. 16A to 16D are diagrams for explaining alignment using anatomical landmarks.

  The model used for the first first integrated dose distribution shown in FIG. 16A is model No. corresponding to model type T2. 13. On the other hand, the model used for the second first integrated dose distribution shown in FIG. 16C is model No. corresponding to the model type T1. 1. The anatomical landmark in the model used for the first first cumulative dose distribution shown in FIG. 16A is the anatomical in the model used for the second first cumulative dose distribution shown in FIG. By aligning with the landmark, the first integrated dose distribution shown in FIG. 16B is obtained. For example, the anatomical landmark L1 in the model used for the first first cumulative dose distribution shown in FIG. 16A is the same as that in the model used for the second first cumulative dose distribution shown in FIG. Aligned to the anatomical landmark L2. Then, as in the display example shown in FIG. 16D, based on the first integrated dose distribution shown in FIG. 16B and the second first integrated dose distribution shown in FIG. A plurality of first integrated doses are integrated for each table position, and a second integrated dose distribution relating to the plurality of body surface positions is calculated.

  Alternatively, the second integrated dose distribution calculating unit 11h may non-rigidly align the plurality of models when the plurality of first integrated dose distributions acquired by the first integrated dose distribution acquiring unit 11g include a plurality of models. Then, the plurality of first integrated dose distributions after the change are integrated for each body surface position according to the alignment.

  Or the 2nd integrated dose distribution calculation means 11h has a conversion factor to a standard model and a standard model of each model beforehand. Then, the second integrated dose distribution calculating unit 11h is configured such that when a plurality of different first integrated dose distributions acquired by the first integrated dose distribution acquiring unit 11g include a plurality of models (first model and second model), The first and second models are converted into standard models by conversion coefficients, respectively. Then, the second integrated dose distribution calculating unit 11h calculates a provisional second integrated dose distribution by integrating the plurality of first integrated dose distributions after the change for each body surface position according to the conversion. Further, the second integrated dose distribution calculating unit 11h converts the standard model into the first model (or the second model), thereby converting the temporary second integrated dose distribution after the change according to the reverse conversion into the second integrated dose distribution. Calculate as

  As described above, according to the first modification of the medical devices 100 and 100A, even when different models are selectable between a plurality of integration units (for example, between a plurality of examinations and between a plurality of treatments), The second cumulative dose of radiation can be displayed more accurately and accurately than the medical devices 100 and 100A described above.

(Second modification)
In the medical device 100 shown in FIG. 2 or the medical device 100A shown in FIG. 15, the model setting unit 11c uses, as the patient information, a model related to the patient information set by the patient information setting unit 11b prior to the examination / treatment. Select and set from past models corresponding to included patient identification information. The model setting unit 11c selects a past model corresponding to the patient identification information included in the patient information set by the patient information setting unit 11b from the models in the first integrated dose distribution stored in the first integrated dose distribution DB 18. And set.

  For example, if the patient identification information included in the patient information set by the patient information setting unit 11b is “P2” shown in FIG. 1 or No. 13 is set. Model No. 1 and no. The operator may select which of 13 is set.

  As described above, according to the second modification of the medical devices 100 and 100A, even when different models are selectable between a plurality of integration units (for example, between a plurality of examinations and between a plurality of treatments), By preferentially selecting and setting a model according to past examinations and treatments, the second cumulative dose of radiation can be displayed accurately and accurately.

  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 the equivalents thereof.

100,100A Medical device 1 having dose management function Integrated dose display system 11 CPU
11a, 11a 'operation support means 11b patient information setting means 11c model setting means 11d first integrated dose receiving means 11e, 11e' first integrated dose distribution registration means 11f patient identification information setting means 11g first integrated dose distribution acquisition means 11h first 2 Integrated dose distribution calculation means 17 Model DB
18 First cumulative dose distribution DB
60 Radiation irradiation equipment

Claims (6)

A medical device provided with an integrated dose display system and a radiation irradiation device,
Model setting means for setting a required model from a plurality of models expressing the human body as a 3D model of a different shape;
First calculation means for obtaining a first integrated dose distribution indicating a dose distribution in a body surface of the required model based on radiation irradiation conditions and registering it in a storage unit;
Second calculating means for integrating a plurality of the first integrated dose distributions acquired from the storage unit to obtain a second integrated dose distribution indicating a dose distribution in a body surface of the required model;
The second calculation means includes
When the plurality of first accumulated dose distributions acquired from the storage unit correspond to a plurality of required models, the dose on the body surface of the standard model is converted by converting each of the plurality of required models into a standard model. Obtaining a plurality of third cumulative dose distributions representing the distribution,
Integrating the plurality of third integrated dose distributions to obtain a fourth integrated dose distribution indicating the dose distribution in the body surface of the standard model;
By inversely transforming the standard model into one of the plurality of required models, the dose distribution after the fourth accumulated dose distribution is inversely transformed according to the inverse transform is calculated as the second accumulated dose distribution. To display,
Medical device. When the plurality of first accumulated dose distributions acquired from the storage unit correspond to the plurality of required models, the second calculation unit is configured to convert the plurality of required models by a preset conversion coefficient. Convert to standard model respectively
The medical device according to claim 1. The model setting means selects and sets a model set in the past corresponding to the same subject,
The medical device according to claim 1 or 2. Model setting means for setting a required model from a plurality of models expressing the human body as a 3D model of a different shape;
First calculation means for obtaining a first integrated dose distribution indicating a dose distribution in a body surface of the required model based on radiation irradiation conditions and registering it in a storage unit;
Second calculating means for integrating a plurality of the first integrated dose distributions acquired from the storage unit to obtain a second integrated dose distribution indicating a dose distribution in a body surface of the required model;
The second calculation means includes
When the plurality of first accumulated dose distributions acquired from the storage unit correspond to a plurality of required models, the dose on the body surface of the standard model is converted by converting each of the plurality of required models into a standard model. Obtaining a plurality of third cumulative dose distributions representing the distribution,
Integrating the plurality of third integrated dose distributions to obtain a fourth integrated dose distribution indicating the dose distribution in the body surface of the standard model;
By inversely transforming the standard model into one of the plurality of required models, the dose distribution after the fourth accumulated dose distribution is inversely transformed according to the inverse transform is calculated as the second accumulated dose distribution. To display,
Integrated dose display system. When the plurality of first accumulated dose distributions acquired from the storage unit correspond to the plurality of required models, the second calculation unit is configured to convert the plurality of required models by a preset conversion coefficient. Convert to standard model respectively
The integrated dose display system according to claim 4. The model setting means selects and sets a model set in the past corresponding to the same subject,
The integrated dose display system according to claim 4 or 5.