JP7273557B2 - Bed device for medical diagnostic imaging equipment - Google Patents

Description

Embodiments of the present invention relate to a couch apparatus for a medical imaging apparatus.

In radiation therapy, a treatment plan is first created. A treatment plan is created using medical image data generated by a medical image diagnostic apparatus such as an X-ray computed tomography apparatus or a magnetic resonance imaging apparatus. Although the top surface of the X-ray computed tomography apparatus and the magnetic resonance imaging apparatus has a curved shape, the top surface of the radiotherapy apparatus has a flat shape. Since the shape of the top surface of the tabletop differs between the time of treatment planning and the time of radiotherapy, the external and internal shapes of the patient lying on the table will differ, and as a result, the position of the tumor in the patient's body during radiotherapy will differ. It may deviate from the position in the patient's body at the time of planning. In order to reduce such positional deviation, there is a technique of attaching an attachment to the top plate of an X-ray computed tomography apparatus or a magnetic resonance imaging apparatus and attaching a flat top plate to the attachment. However, attachment and detachment of the attachment and the top plate are troublesome and costly, and a storage space for the top plate is required.

JP-A-2000-262503 Japanese Patent Application Laid-Open No. 2003-190304

The problem to be solved by the invention is to easily and reduce the displacement of the tumor in the patient's body between the time of treatment planning and the time of radiotherapy due to the difference in the top plate shape between the time of treatment planning and the time of radiotherapy. to reduce costs.

A bed apparatus for a medical image diagnostic apparatus according to an embodiment has a first surface having a shape for imaging a medical image used in radiotherapy planning and a surface opposite to the first surface, and the medical image A top plate having a second surface having a shape for capturing medical images used for diagnosis, a support base for supporting the top plate, and an attachment/detachment mechanism for attaching/detaching the top plate to/from the support base. and

FIG. 1 is a diagram showing the configuration of a medical image diagnostic apparatus according to this embodiment. FIG. 2 is a diagram showing the appearance of the medical imaging mechanism and bed of FIG. FIG. 3 is a perspective view of the top plate according to the present embodiment when the first surface faces vertically upward. 4 is a cross-sectional view of the top plate of FIG. 3. FIG. FIG. 5 is a perspective view of the top plate according to the present embodiment when the second surface faces vertically upward. 6 is a cross-sectional view of the top plate of FIG. 5. FIG. FIG. 7 is a rear view of the bed from which the top plate has been removed according to the present embodiment. FIG. 8 is a side view of the top plate and the support mechanism according to this embodiment. FIG. 9 is a diagram showing switching of the use surface of the top plate according to the present embodiment. FIG. 10 is a diagram showing a support frame on which a support mechanism (ball screw) according to a modification of this embodiment is mounted. FIG. 11 is a perspective view of the top plate when the second surface faces vertically upward according to the modification. 12 is a cross-sectional view of the top plate of FIG. 11 taken along line 12-12'. 13 is a cross-sectional view of the top plate of FIG. 11 taken along line 13-13'. FIG. 14 is a perspective view of the top plate when the first surface faces vertically upward according to the modification. FIG. 15 is a diagram showing switching of the used surface of the top plate according to the modification.

A bed device for a medical image diagnostic apparatus according to this embodiment will be described below with reference to the drawings.

The medical image diagnostic apparatus according to this embodiment can be applied to any modality apparatus capable of generating medical image data used for treatment planning regarding radiotherapy. Examples of such medical image diagnostic apparatuses include an X-ray computed tomography apparatus, a magnetic resonance imaging apparatus, a PET apparatus (Positron Emission Tomography), and a SPECT (Single Photon Emission Computed Tomography) apparatus.

FIG. 1 is a diagram showing the configuration of a medical image diagnostic apparatus 1 according to this embodiment. As shown in FIG. 1, the medical image diagnostic apparatus 1 according to this embodiment has a medical imaging mechanism 10, a bed 30 and a console 50. As shown in FIG.

The medical imaging mechanism 10 performs medical imaging on a patient according to the imaging principle according to the type of modality device, and collects raw data on the patient. The medical imaging mechanism 10 according to this embodiment is used for both medical imaging for treatment planning and medical imaging for image diagnosis.

As shown in FIG. 1 , the bed 30 is arranged near a pedestal included in the medical imaging mechanism 10 . As shown in FIG. 1 , the bed 30 has a top plate 31 , a support mechanism 33 , a drive device 35 and a control device 37 . The top plate 31 is a plate-like structure on which a patient is placed. The support mechanism 33 supports the top plate 31 so as to be movable in the vertical and forward/backward directions. The driving device 35 drives the support mechanism 33 to move the top plate 31 in the vertical and forward and backward directions. The control device 37 controls the driving device 35 according to commands from at least one of the medical imaging mechanism 10 and the console 50 .

As shown in FIG. 1 , the console 50 is a computer that controls at least one of the medical imaging mechanism 10 and the bed 30 . Console 50 has processing circuitry 51 , memory 54 , display 55 , input interface 57 and communication interface 59 .

The processing circuit 51 has a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). By activating a program installed in the memory 53 or the like, the processor executes an imaging control function, an image reconstruction function, an image display function, and the like. For example, by executing an imaging control function, the processing circuit 51 synchronously controls the medical imaging mechanism and the bed to perform medical imaging on the patient. By executing the image reconstruction function, the processing circuit 51 performs reconstruction processing on raw data from the medical imaging mechanism 10 to reconstruct medical image data relating to the patient. By executing the image display function, the processing circuit 51 displays medical image data on the display 55 . At this time, the processing circuit 51 performs arbitrary rendering processing such as volume rendering and MPR (Multi-Planer Reconstruction) on the medical image data to generate display image data, and displays the generated display image data on the display 55 . can be In the present embodiment, medical images acquired for treatment planning are also called treatment planning images, and medical images acquired for image diagnosis are also called diagnostic images.

The memory 53 is a storage device such as a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), an SSD (Solid State Drive), or an integrated circuit storage device that stores various information. The memory 53 stores, for example, programs used by the processing circuit 51, medical image data, and the like. The memory 53 can be a CD (Compact Disc), a DVD (Digital Versatile Disc), a portable storage medium such as a flash memory, or a driving device that reads and writes various information from/to a semiconductor memory device, etc., in addition to the above storage devices. may be Alternatively, memory 53 may reside in another computer connected to console 50 via a network.

The display 55 displays various information according to the display control function of the processing circuit 51 . For example, the display 55 displays medical images and display images. The display 55 also outputs a GUI (Graphical User Interface) or the like for accepting various operations from the user. For example, as the display 55, a liquid crystal display (LCD), a CRT (Cathode Ray Tube) display, an organic EL display (OELD: Organic Electro Luminescence Display), a plasma display, or any other display can be used as appropriate. be.

The input interface 57 receives various input operations from the user, converts the received input operations into electrical signals, and outputs the electrical signals to the processing circuit 51 . Specifically, the input interface 57 is connected to input devices such as a mouse, keyboard, trackball, switch, button, joystick, touch pad, and touch panel display. The input interface 57 outputs an electrical signal to the processing circuit 51 according to an input operation to the input device. Also, the input device connected to the input interface 57 may be an input device provided in another computer connected via a network or the like.

The communication interface 59 is an interface for data communication with other computers and systems such as a treatment planning device, radiation therapy device, PACS, and OIS.

FIG. 2 is a diagram showing the appearance of the medical imaging mechanism 10 and the bed 30. As shown in FIG. The medical imaging mechanism 10 performs medical imaging on a patient according to the imaging principle according to the type of modality device, and collects raw data on the patient. The medical imaging mechanism 10 according to this embodiment is used for both medical imaging for treatment planning and medical imaging for image diagnosis. For example, as shown in FIG. 2 , the medical imaging mechanism 10 has a pedestal 11 arranged near a bed 30 . The gantry 11 is equipped with a scanning mechanism.

For example, when the medical image diagnostic apparatus 1 is an X-ray computed tomography apparatus, the gantry 11 irradiates the patient with X-rays from the X-ray tube while rotating the X-ray tube and the X-ray detector around the patient, X-rays that pass through the patient are detected by an X-ray detector. An X-ray detector generates an electrical signal having a crest value corresponding to the dose of detected X-rays. The electrical signal is subjected to signal processing such as A/D conversion by a data acquisition circuit. The electric signal after A/D conversion is called projection data or sinogram data. Projection data or sinogram data is transmitted to the console 50 as raw data.

For example, when the medical image diagnostic apparatus 1 is a magnetic resonance imaging apparatus, the gantry 11 applies a static magnetic field via a static magnetic field magnet, a gradient magnetic field via a gradient magnetic field coil, and an RF signal via a transmission coil. The application of pulses is repeated. MR signals emitted from the patient due to the application of RF pulses are emitted. Emitted MR signals are received via a receive coil. The received MR signal is subjected to signal processing such as A/D conversion by the receiving circuit. The MR signal after A/D conversion is called k-space data. The k-space data is transmitted to console 50 as raw data.

For example, when the medical image diagnostic apparatus 1 is a PET apparatus, the pedestal 11 is 512 keV generated due to pair annihilation of positrons generated from radionuclides accumulated in the patient and electrons existing around the radionuclides. By simultaneously measuring the pair of gamma rays by a coincidence measurement circuit, digital data having digital values relating to the energy value and detection position of the pair of gamma rays (LOR (Line Of Response)) is generated. The digital data is called coincidence data or sinogram data. The coincidence data or sinogram data are transmitted to the console 50 as raw data.

For example, if the medical image diagnostic apparatus 1 is a SPECT apparatus, the gantry 11 detects gamma rays emitted from radionuclides accumulated in the patient with a gamma ray detector. The gamma ray detector generates digital data having digital values relating to the detected gamma ray energy value and detection position. Such digital data is called projection data or sinogram data. Projection data or sinogram data is transmitted to the console 50 as raw data.

As shown in FIG. 2, the bed 30 has a top plate 31 and a support base 41 in appearance. The support base 41 is installed on the floor and supports the top plate 31 so that it can be vertically moved up and down and horizontally. Specifically, the support base 41 has a base 43 and a support frame 45 . The base 43 is installed on the floor and supports the support frame 45 and the top plate 31 so that they can be raised and lowered in the vertical direction. The support frame 45 supports the top plate 31 so as to be horizontally movable. Note that the base 43 may support the support frame 45 so as to be horizontally movable. Here, the vertical direction is defined as the Y direction, the major axis direction of the top plate 31 is defined as the Z direction, and the direction horizontally orthogonal to the Y and Z directions is defined as the X direction.

The top plate 31 according to the present embodiment has a first surface having a shape for imaging a medical image used for radiotherapy planning, and a surface opposite to the first surface. and a second surface having a shape for capturing an image. Both the first surface and the second surface are surfaces on which a patient is placed. Since the top plate 31 has the first surface and the second surface, one top plate 31 is used for collecting medical images used for radiotherapy planning and for collecting medical images used for medical image diagnosis. It can be used both for medical imaging and for medical imaging. Hereinafter, the first side will be referred to as the treatment planning side and the second side will be referred to as the diagnostic imaging side.

FIG. 3 is a perspective view of the top plate 31 when the treatment planning surface 311 faces vertically upward. FIG. 4 is a cross-sectional view of the top plate 31 of FIG. FIG. 5 is a perspective view of the top plate 31 when the diagnostic imaging surface 312 faces vertically upward. FIG. 6 is a cross-sectional view of the top plate 31 of FIG. As shown in FIGS. 3, 4, 5 and 6, the top plate 31 is a plate-like structure having a substantially rectangular shape. 3 and the like, the direction along the long axis of the top plate 31 is called the long axis direction, the direction along the short axis of the top plate 31 is called the short axis direction, and the thickness direction of the top plate 31 is called the thickness direction. The long axis direction, short axis direction and thickness direction are orthogonal to each other.

As shown in FIGS. 3, 4, 5, and 6, the treatment planning surface 311 according to the present embodiment is a surface on which a patient is placed, and is used for capturing medical images used for radiotherapy planning. has the shape of Specifically, the treatment planning surface 311 has a curved shape such that the thickness decreases from the ends in the minor axis direction toward the center. By having such a curved shape, the patient can be wrapped in the top plate 31, and the reproducibility of the patient's placement position on the treatment planning surface 311 can be enhanced. Note that the treatment planning surface 311 typically does not change in thickness in the longitudinal direction. The diagnostic imaging surface 312 is the back surface of the treatment planning surface 311 . The image diagnosis surface 312 is a surface on which a patient is placed, and has a shape for capturing medical images used for medical image diagnosis. Specifically, the diagnostic imaging surface 312 has a flat shape with respect to the minor axis direction and the major axis direction. Having such a flat shape allows accurate positioning of the patient on the diagnostic imaging surface 312 .

By mounting on the bed 30 so that the treatment planning surface 311 faces upward, imaging for medical images used for treatment planning can be performed. In addition, by mounting on the bed 30 so that the image diagnosis surface 312 faces upward, it is possible to perform imaging for medical images used for medical image diagnosis. In this way, the surface facing upward with respect to the bed 30 is used as a use surface for imaging.

As shown in FIGS. 3, 4, 5 and 6, a pair of engaging portions 32 having a convex shape are provided on both side surfaces of the top plate 31. As shown in FIGS. The engaging portion 32 is provided for engaging the top plate 31 with a predetermined portion of the bed 30 . The top plate 31 is attached to the bed 30 by engaging the engaging portion 32 with the bed 30 . The engaging portion 32 may be made of the same material as the top plate 31, or may be made of another material. Further, the engaging portion 32 may be formed integrally with the top plate 31, or may be formed separately from the top plate 31 and attached to the top plate 31 with a fastener such as a screw or an adhesive. .

FIG. 7 is a rear view of the bed 30 with the top plate 31 removed. As shown in FIG. 7, the support frame 45 of the bed 30 is provided with an attachment/detachment mechanism 47 for detachably supporting the top plate 31 on the support base 41 . The attachment/detachment mechanism 47 is specifically realized by a guide extending in the longitudinal direction. A pair of guides 47 extending in the Z-axis direction are provided on both sides of the support frame 45 in the X-axis direction. Each guide 47 has a fitting portion 471 that structurally fits into the engaging portion 32 . For example, a fitting portion 471 is formed on the inner surface of each guide 47 . When the engaging portion 32 has a convex shape, the fitting portion 471 has a concave portion that fits into the convex shape.

As shown in FIG. 7, the support frame 45 accommodates a support mechanism 33 that supports the top plate 31 movably in the Z-axis direction and a drive device 35 that drives the support mechanism 33 . The support mechanism 33 may be implemented by any mechanical element as long as it can support the top plate 31 movably in the Z-axis direction. For example, the support mechanism 33 is implemented by a rack and pinion.

FIG. 8 is a side view of the top plate 31 and the support mechanism 33 according to this embodiment. As shown in FIG. 8 , a plurality of teeth (racks) 321 are formed on the lower surface of the engaging portion 32 . A pinion 351 that meshes with the rack 321 is provided inside the support frame 45 and the guide 47 positioned below the engaging portion 32 . More specifically, the pinion 351 is provided at a position where it can mesh with the rack 321 of the engaging portion 32 when the top plate 31 is attached to the guide 47, that is, at one end of the support frame 45 in the X-axis direction. . A driving device 35 (not shown in FIG. 8) is connected to the pinion 351 via a power transmission mechanism such as a shaft 353 . The driving device 35 rotates the pinion 351 and slides the top plate 31 in the ±Z directions. For example, when the driving device 35 rotates in the forward direction and the pinion 351 rotates in the +Z direction, the top plate 31 slides in the +Z direction, and when the driving device 35 rotates in the reverse direction, the pinion 351 rotates in the -Z direction. By doing so, the top plate 31 slides in the -Z direction. The rotation direction of the driving device 35 or the sliding direction of the top plate 31 can be arbitrarily switched.

The rack 321 is formed on each of the pair of engaging portions 32 so that the rack 321 is engaged with the pinion 351 even when the surface of the top plate 31 is switched. For example, when rotating the top plate 31 around the longitudinal axis to switch the surface to be used, the racks 321 are formed alternately up and down with respect to the pair of engaging portions 32 as shown in FIGS. 4 and 6 . That is, for example, when the rack 321 is formed on the lower surface of the engaging portion 32 on the +X-axis direction side of the top plate 31, the rack 321 is formed on the upper surface of the engaging portion 32 on the −X-axis direction side.

In the above description, the pinion 351 is provided on one end side of the support frame 45 and the guide 47 in the X-axis direction. However, this embodiment is not limited to this. For example, the pinion 351 may be provided at each end of the support frame 45 and the guide 47 in the X-axis direction. In this case, a rack 321 is preferably formed on each of the upper and lower surfaces of the pair of engaging portions 32 .

FIG. 9 is a diagram showing switching of the use surface of the top plate 31 according to this embodiment. As shown in the upper left part of FIG. 9, first, it is assumed that the top plate 31 is attached to the guide 47 so that the diagnostic imaging surface 312 having a curved surface faces upward. By performing medical imaging with the medical imaging mechanism 10 in this state, medical images used for medical image diagnosis can be acquired. When switching the use surface of the top plate 31 from the image diagnosis surface 312 to the treatment planning surface 311 having a flat surface, as shown in the upper right part of FIG. from the +Z direction or -Z direction. Next, the medical staff turns over the tabletop 31 so that the treatment planning surface 311 faces upward, as shown in the lower right part of FIG. Then, the medical staff inserts the top plate 31 in the +Z direction or the -Z direction, as shown in the lower left part of FIG. By the above operation, the use surface of the top plate 31 can be switched from the image diagnosis surface 312 to the treatment planning surface 311 . A treatment planning image can be acquired by performing medical imaging with the medical imaging mechanism 10 with the treatment planning surface 311 facing upward.

It is also possible to switch the use surface of the tabletop from the treatment planning surface 311 to the image diagnosis surface 312 by the same operation as described above.

As described above, the bed 30 according to this embodiment has the top plate 31 , the support base 41 and the attachment/detachment mechanism 47 . The top plate 31 has a treatment planning surface 311 having a shape for imaging a medical image used for radiotherapy planning and a surface opposite to the treatment planning surface 311, and is used for medical image diagnosis. and a diagnostic imaging surface 312 having a shape for imaging. The support base 41 supports the top plate 31 . The attaching/detaching mechanism 47 has a structure for attaching/detaching the top plate 31 to/from the support base 41 .

With the above configuration, in the bed 30 according to the present embodiment, the single tabletop 31 performs both imaging for medical images used for radiotherapy planning and imaging for medical images used for medical image diagnosis. Can be used in combination. Therefore, unlike the case where two top plates having different shapes are separately used, the top plate 31 according to the present embodiment is low in cost and does not need to be removed from the bed 30 for storage, thereby securing a storage space. you don't have to. According to this embodiment, imaging is performed with the treatment planning surface 311 as the surface to be used, so that the shape of the surface to be used of the tabletop on which the patient is placed is captured for the treatment planning image and during radiotherapy. can be made substantially the same. Therefore, it is possible to reduce the displacement of the tumor in the patient's body between the time of treatment planning and the time of radiotherapy due to the discrepancy in the shape of the top plate between the time of treatment planning and the time of radiotherapy.

(Modification)
In the above embodiment, the support mechanism 33 is realized by a rack and pinion. However, this embodiment is not limited to this. The support mechanism 33 may be any mechanical element as long as it can support the top plate movably in the Z-axis direction. For example, the support mechanism 33 may be formed by a ball screw, linear motion guide, or the like.

FIG. 10 is a diagram showing a support frame 45 on which a support mechanism (ball screw) 61 according to a modification is mounted. As shown in FIG. 10 , the ball screw 61 has a screw shaft 611 arranged parallel to the long axis of the top plate 31 . A slider 612 that slides along the screw shaft 611 is attached to the screw shaft 611 . Specifically, a nut (not shown) that meshes with a thread formed on the screw shaft 61 is screwed onto the screw shaft 611, and the slider 612 is provided on the nut. The top plate 31 is connected to the slider 612 . A driving device 35 (not shown in FIG. 10) is connected to the screw shaft 611 via a power transmission mechanism such as a shaft. The driving device 35 rotates the screw shaft 611 about its axis, and the slider 612 and the top plate 31 slide integrally in the ±Z direction in conjunction with the rotation of the screw shaft 611 . For example, when the drive device 35 rotates in the forward direction, the top plate 31 slides in the +Z direction, and when the drive device 35 rotates in the reverse direction, the top plate 31 slides in the -Z direction. The rotation direction of the driving device 35 or the sliding direction of the top plate 31 can be arbitrarily switched.

Linear motion guides 63 are provided on both sides of the ball screw 61 in the support frame 45 . The linear motion guide 63 is provided parallel to the axis of the screw shaft 611 . The linear motion guide 63 is a mechanical element that guides the sliding of the slider 612 in the Z-axis direction.

FIG. 11 is a perspective view of the top plate 31 when the diagnostic imaging surface 313 is directed upward according to the modification. 12 is a cross-sectional view of the top plate of FIG. 11 taken along line 12-12'. 13 is a cross-sectional view of the top plate of FIG. 11 taken along line 13-13'. FIG. 14 is a perspective view of the top plate 31 when the treatment planning surface 311 is directed upward according to the modification. As shown in FIGS. 11, 12, 13 and 14, the treatment planning surface 311 according to the modified example has a flat shape as in the above embodiment. As shown in FIGS. 11, 12, 13, and 14, one end 314 in the longitudinal direction of the diagnostic imaging surface 313 according to the modification has a non-curved shape, and portions other than the one end (hereinafter referred to as other 315 has a curved shape for imaging for medical diagnostic imaging. One end 314 functions as a connection surface with slider 612 . That is, the surface of the one end portion 314 has a shape that can be in close contact with the surface of the slider 612 . For example, if the surface of slider 612 has a flat shape, the surface of one end 314 also has a flat shape. Even when a patient is placed on the diagnostic imaging surface 313, the one end 314 is less likely to interfere with patient placement. This is because the one end portion 314 is provided at the end portion of the top plate 31 .

As shown in FIG. 10, the slider 612 is provided with a screw hole 71 for screwing with the one end portion 314 . As shown in FIGS. 11 and 14, a portion of each of the treatment planning surface 311 of the top plate 31 and one end portion 314 of the image diagnosis surface 313, which is aligned with the screw hole 71, also has a screw hole 73. be provided. A screw hole 71 provided in the slider 612 and a screw hole 73 provided in the top plate 31 function as an attachment/detachment mechanism. A screw is screwed into the screw hole 71 and the screw hole 73 while the slider 612 and one end 314 of the top plate 31 are in close contact so that the screw hole 71 of the slider 612 and the screw hole 73 of the top plate 31 are aligned. As a result, the slider 612 and the top plate 31 are connected.

FIG. 15 is a diagram showing switching of the use surface of the top plate 31 according to the modification. As shown in the upper left part of FIG. 15, first, it is assumed that the top plate 31 is attached to the slider 612 so that the diagnostic imaging surfaces 314 and 315 face upward. By performing medical imaging with the medical imaging mechanism 10 in this state, medical images used for medical image diagnosis can be acquired. When switching the surface of the top plate 31 to be used from the diagnostic imaging surfaces 314 and 315 to the treatment planning surface 311, the medical staff tightens the screws that fasten the top plate 31 and the slider 612 as shown in the upper right part of FIG. is removed to separate the top plate 31 from the slider 612 . Next, the medical staff turns over the tabletop 31 so that the treatment planning surface 311 faces upward, as shown in the lower right part of FIG. Then, the medical staff puts the top plate 31 on the slider 612 and fastens the top plate 31 and the slider 612 with screws, as shown in the lower left part of FIG. 15 . By the above operation, the use surface of the top plate 31 can be switched from the image diagnosis surfaces 314 and 315 to the treatment planning surface 311 . A treatment planning image can be acquired by performing medical imaging with the medical imaging mechanism 10 with the treatment planning surface 311 facing upward.

It is also possible to switch the use surface of the tabletop from the treatment planning surface 311 to the image diagnosis surface 312 by the same operation as described above.

As described above, according to the modified example, even when the support mechanism 33 is realized by the ball screw 61 , the top plate 31 can be detachably and slidably attached to the bed 30 by the ball screw 61 . According to the modified example, it is not necessary to provide the guides 47 on the support frame 45 or to provide the engaging portions 32 on both side surfaces of the top plate 31, so the structure can be simplified as compared with the above-described embodiment. can. On the other hand, according to the above-described embodiment, the top plate 31 can be attached to and detached from the bed 30 by pulling out and inserting the top plate 31 from the guides 47, so that the top plate 31 can be easily attached and detached compared to the modified example. It can be attached to and detached from the bed 30 .

According to at least one embodiment described above, the displacement of the tumor in the patient's body between the time of treatment planning and the time of radiotherapy due to the discrepancy in the top plate shape between the time of treatment planning and the time of radiotherapy is It can be reduced easily and at low cost.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

1 Medical Image Diagnosis Apparatus 10 Medical Imaging Mechanism 11 Base 30 Bed 31 Top Plate 32 Engaging Portion 33 Support Mechanism 35 Drive Device 37 Control Device 41 Support Base 43 Base 45 Support Frame 47 Detachable Mechanism (Guide)
50 console 51 processing circuit 53 memory 54 memory 55 display 57 input interface 59 communication interface 61 support mechanism (ball screw)
63 Linear motion guide 71 Screw hole 73 Screw hole 311 Treatment planning surface 312 Image diagnosis surface 313 Image diagnosis surface 314 Image diagnosis surface 315 Image diagnosis surface other portion 321 Teeth (rack)
351 Pinion 353 Shaft 471 Fitting portion 611 Screw shaft 612 Slider

Claims (2)

A first surface having a shape for capturing a medical image used for radiotherapy planning, and a surface on the opposite side of the first surface having a shape for capturing a medical image used for medical image diagnosis. a top plate having a second surface;
a support base for supporting the top plate;
an attaching/detaching mechanism for attaching/detaching the top plate to/from the support base ;
The first surface has a flat shape,
the second surface has a curved shape,
The support base has a ball screw that supports the top plate movably along the long axis of the top plate,
The ball screw has a screw shaft rotatable around its axis and a slider that moves along the screw shaft in conjunction with rotation of the screw shaft,
The attachment/detachment mechanism is provided on the slider,
A bed device for medical diagnostic imaging equipment. A first surface having a shape for capturing a medical image used for radiotherapy planning, and a surface on the opposite side of the first surface having a shape for capturing a medical image used for medical image diagnosis. a top plate having a second surface;
a support base for supporting the top plate;
an attaching/detaching mechanism for attaching/detaching the top plate to/from the support base ;
The support base has a ball screw that supports the top plate movably along the long axis of the top plate,
The ball screw has a screw shaft rotatable around its axis and a slider that moves along the screw shaft in conjunction with rotation of the screw shaft,
The attachment/detachment mechanism is provided on the slider,
The first surface has a flat shape,
The second surface has an end portion in the longitudinal direction of the top plate and a portion other than the end portion of the second surface,
said end having a flat shape for connection to said slider;
The other portion has a curved shape,
A bed device for medical diagnostic imaging equipment.

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