JP2023183463A - X-ray computer tomography apparatus and medical bed device - Google Patents

Abstract

To make convenience of power supply to a biological information detector during imaging using a medical image diagnostic apparatus better than ever.SOLUTION: An X-ray computer tomography apparatus according to the present embodiment comprises a frame, a bed and a battery. The bed, which has a top board for being loaded with a subject, moves the top board to a hollow part of the frame. The battery, which is provided in the bed, is moved with the top board.SELECTED DRAWING: Figure 2

Description

Embodiments disclosed in this specification and the drawings relate to an X-ray computed tomography apparatus and a medical bed apparatus.

Conventionally, various medical devices such as image diagnostic devices such as X-ray computed tomography (CT) devices and treatment devices have been used for medical activities such as examinations and treatments. For example, in a medical device equipped with a bed, an electrocardiograph or a respiratory synchronization device (hereinafter also collectively referred to as a biological information detection device) may be placed on the top of the bed to photograph a subject. be. In such cases, the power cables of the electrocardiograph and respiratory synchronization device are connected to an outlet installed on the wall of the examination room or to an outlet installed on the bed.

However, when connecting the power cable to a wall outlet, the power cable gets in the way when the top plate moves. Furthermore, when installing an outlet on the bed, a separate movable cable that moves when the top plate is operated is required, and for example, there is a possibility that the movable cable is damaged while the top plate is operated.

Japanese Patent Application Publication No. 2002-159490

One of the problems that the embodiments disclosed in this specification etc. are intended to solve is to improve the convenience of power supply to a biological information detection device during imaging using a medical image diagnostic device compared to the past. be. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problems. Issues corresponding to each configuration shown in the embodiments described later can also be positioned as other issues.

The X-ray computed tomography apparatus according to the embodiment includes a pedestal, a bed, and a battery. The bed has a top plate on which the subject is placed, and the top plate is moved into the hollow of the pedestal. A battery is provided on the bed and moves together with the top plate.

FIG. 1 is a diagram showing an example of the configuration of an X-ray computed tomography apparatus equipped with a medical bed apparatus according to an embodiment. FIG. 2 is a diagram schematically showing an example of the positions of the top plate and battery of the medical bed apparatus according to the embodiment. FIG. 3 is a diagram schematically showing an example of the positions of the top plate and battery of the medical bed apparatus according to the embodiment. FIG. 4 is a diagram schematically showing an example for explaining the timing of charging the battery from the charger of the medical bed apparatus according to the embodiment.

Hereinafter, an X-ray computed tomography apparatus and a medical bed apparatus according to each embodiment will be described with reference to the drawings. In the following description, components having the same or substantially the same functions as those described above with respect to the existing figures are denoted by the same reference numerals, and will be described repeatedly only when necessary.

Furthermore, even when the same part is shown, the dimensions and ratios may be shown differently depending on the drawing. In addition, for example, from the perspective of ensuring the visibility of the drawings, only the main or representative components are given reference numerals in the explanation of each drawing, and even if the components have the same or almost the same function, reference numerals are given. In some cases, it is not attached.

In each of the embodiments described below, a case will be exemplified in which the medical bed device according to each embodiment is a bed of an X-ray computed tomography apparatus.

For example, there are various types of X-ray computed tomography apparatuses, such as third generation CT and fourth generation CT, and any type can be applied to each embodiment. Here, the third generation CT is a Rotate/Rotate-Type in which the X-ray tube and the detector rotate together around the subject. The fourth generation CT is a Stationary/Rotate-Type in which a large number of X-ray detection elements arrayed in a ring shape are fixed, and only the X-ray tube rotates around the subject.

Note that the medical bed apparatus according to each embodiment may be a bed of a medical image diagnostic apparatus other than an X-ray computed tomography apparatus. Other medical image diagnostic devices include MRI (Magnetic Resonance Imaging) devices, SPECT (Single Photon Emission Computed Tomography) devices, and PET (Positron Emission Computed Tomography) devices. Tomography) device, SPECT device, and X-ray computed tomography device are integrated. There may be various medical image diagnostic apparatuses such as a SPECT-CT apparatus, a PET-CT apparatus in which a PET apparatus and an X-ray computed tomography apparatus are integrated.

FIG. 1 is a diagram showing an example of the configuration of an X-ray computed tomography apparatus 1 equipped with a medical bed apparatus according to an embodiment. As shown in FIG. 1, the X-ray computed tomography apparatus 1 includes a pedestal 10, a bed 30, and a console 40. In addition, in FIG. 1, a plurality of mounts 10 are drawn for convenience of explanation. The pedestal 10 is a scanning device having a configuration for performing X-ray CT imaging of the subject P. The bed 30 is a transport device on which a subject P to be subjected to X-ray CT imaging is placed and for positioning the subject P.

The console 40 is a computer that controls the gantry 10 and the bed 30. For example, the gantry 10 and bed 30 are installed in a CT examination room, and the console 40 is installed in a control room adjacent to the CT examination room. The gantry 10, the bed 30, and the console 40 are connected to each other by wire or wirelessly so that they can communicate with each other.

Note that the console 40 does not necessarily have to be installed in the control room. For example, the console 40 may be installed together with the gantry 10 and the bed 30 in the same room. Further, the console 40 may be incorporated into the pedestal 10.

In this embodiment, the rotation axis of the rotation frame 13 in a non-tilted state or the longitudinal direction of the top plate 33 of the bed 30 is the Z-axis direction, and the axis direction perpendicular to the Z-axis direction and horizontal to the floor surface is the X-axis direction. An axial direction that is orthogonal to the axial direction and the Z-axis direction and perpendicular to the floor surface is defined as the Y-axis direction.

As shown in FIG. 1, the pedestal 10 includes an X-ray tube 11, an X-ray detector 12, a rotating frame 13, an X-ray high voltage device 14, a control device 15, a wedge 16, a collimator 17, and a data acquisition system. :DAS) 18.

The X-ray tube 11 is a vacuum tube having a cathode (filament) that generates thermoelectrons and an anode (target) that generates X-rays upon collision with the thermoelectrons. The X-ray tube 11 uses a high voltage supplied from the X-ray high voltage device 14 to irradiate the subject P with X-rays by irradiating thermoelectrons from the cathode to the anode.

Note that the hardware that generates X-rays is not limited to the X-ray tube 11. For example, instead of the X-ray tube 11, a fifth generation method may be used to generate X-rays. The fifth generation method consists of a focus coil that focuses the electron beam generated from the electron gun, a deflection coil that electromagnetically deflects it, and a target ring that surrounds half the circumference of the subject P and generates X-rays when the deflected electron beam collides with it. including.

The X-ray detector 12 detects the X-rays emitted from the X-ray tube 11 and passed through the subject P, and outputs an electrical signal corresponding to the dose of the detected X-rays to the data acquisition circuit 18. The X-ray detector 12 has, for example, an X-ray detection element row in which a plurality of X-ray detection elements are arranged in the channel direction along one circular arc centered on the focal point of the X-ray tube 11.

The X-ray detector 12 has, for example, a structure in which a plurality of X-ray detection elements are arranged in a slice direction (column direction, row direction) in a channel direction. Further, the X-ray detector 12 is, for example, an indirect conversion type detector having a grid, a scintillator array, and a photosensor array. A scintillator array has multiple scintillators. The scintillator has a scintillator crystal that outputs an amount of light depending on the amount of incident X-rays. The grid is disposed on the X-ray incident surface side of the scintillator array and has an X-ray shielding plate that has a function of absorbing scattered X-rays.

Note that the grid is sometimes called a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array has a function of converting the light from the scintillator into an electrical signal according to the amount of light. As the optical sensor, for example, a photomultiplier tube (PMT) or the like is used. Note that the X-ray detector 12 may be a direct conversion type detector having a semiconductor element that converts incident X-rays into electrical signals. Here, the X-ray detector 12 is an example of a detection unit.

The rotating frame 13 is an annular frame that supports the X-ray tube 11 and the X-ray detector 12 facing each other, and rotates the X-ray tube 11 and the X-ray detector 12 by a control device 15, which will be described later. An image field of view (FOV) is set in the opening 19 of the rotating frame 13. For example, the rotating frame 13 is cast from aluminum.

Note that, in addition to the X-ray tube 11 and the X-ray detector 12, the rotating frame 13 can also support an X-ray high voltage device 14, a wedge 16, a collimator 17, a data acquisition circuit 18, and the like. Further, the rotating frame 13 can further support various configurations not shown in FIG. 1.

The X-ray high voltage device 14 includes a high voltage generator and an X-ray control device. The high voltage generator includes electric circuits such as a transformer and a rectifier, and generates a high voltage to be applied to the X-ray tube 11 and a filament current to be supplied to the X-ray tube 11. The X-ray control device controls the output voltage according to the X-rays emitted by the X-ray tube 11.

The high voltage generator may be of a transformer type or an inverter type. The X-ray high voltage device 14 may be provided on the rotating frame 13 within the gantry 10, or may be provided on a fixed frame (not shown) within the gantry 10. Note that the fixed frame is a frame that rotatably supports the rotating frame 13.

The control device 15 includes a drive mechanism such as a motor and an actuator, and a processing circuit including a processor, memory, etc. that controls the drive mechanism. The control device 15 receives input signals from the input interface 43, an input interface provided on the pedestal 10, etc., and controls the operation of the pedestal 10 and the bed 30.

The operation control by the control device 15 includes, for example, control to rotate the rotating frame 13, control to tilt the gantry 10, control to operate the bed 30, and the like. Note that the control for tilting the pedestal 10 is such that the control device 15 rotates the rotating frame 13 around an axis parallel to the X-axis direction based on inclination angle (tilt angle) information input through an input interface attached to the pedestal 10. This is achieved by making

Note that the control device 15 may be provided on the pedestal 10 or may be provided on the console 40. Here, the control device 15 may be an example of a medical bed control device.

The wedge 16 is a filter for adjusting the amount of X-rays irradiated from the X-ray tube 11. Specifically, the wedge 16 transmits and attenuates the X-rays emitted from the X-ray tube 11 so that the X-rays emitted from the X-ray tube 11 to the subject P have a predetermined distribution. This is a filter that

For example, the wedge 16 is a wedge filter or a bow-tie filter, and is formed by processing aluminum or the like to have a predetermined target angle and a predetermined thickness.

The collimator 17 limits the irradiation range of the X-rays that have passed through the wedge 16. The collimator 17 slidably supports a plurality of lead plates that shield X-rays, and adjusts the shape of the slit formed by the plurality of lead plates. Note that the collimator 17 is sometimes called an X-ray diaphragm.

The data acquisition circuit 18 reads out an electrical signal from the X-ray detector 12 that corresponds to the dose of X-rays detected by the X-ray detector 12 . The data acquisition circuit 18 amplifies the read electrical signal and integrates (adds) the electrical signal over the viewing period to collect detection data having a digital value corresponding to the dose of X-rays over the viewing period. The detected data is called projection data.

The data acquisition circuit 18 is realized, for example, by an application specific integrated circuit (ASIC) equipped with circuit elements capable of generating projection data. The projection data is transmitted to the console 40 via a non-contact data transmission device or the like. Here, the data collection circuit 18 is an example of a detection section.

Note that the detection data generated by the data collection circuit 18 is transmitted to a non-rotating portion of the pedestal 10 (for example, a fixed frame) by optical communication from a transmitter having a light emitting diode (LED) provided on the rotating frame 13. 1 is omitted from the illustration) and is transmitted to a receiver having a photodiode, and then transferred to the console 40. Note that the method of transmitting the detection data from the rotating frame 13 of the rotating part to the non-rotating part of the pedestal 10 is not limited to the above-mentioned optical communication, but any method of non-contact data transfer may be used. .

In this embodiment, an X-ray computed tomography apparatus 1 equipped with an integral type X-ray detector 12 will be described as an example, but the technology according to this embodiment is applicable to a case where a photon-counting type X-ray detector is installed. It can also be realized as a mounted X-ray computed tomography apparatus 1.

The bed 30 is a device on which a subject P to be scanned is placed and a top plate 33 is moved into the hollow space of the pedestal 10 . The bed 30 includes a base 31, a bed driving device 32, a top plate 33, and a support frame 34. The base 31 is a casing that supports the support frame 34 movably in the vertical direction. The bed driving device 32 is a drive mechanism that moves the top plate 33 on which the subject P is placed in the longitudinal direction of the top plate 33. The bed driving device 32 includes a motor, an actuator, and the like.

The top plate 33 is a plate on which the subject P is placed. The top plate 33 is provided on the upper surface of the support frame 34. The top plate 33 can protrude from the bed 30 toward the gantry 10 (it can move in the longitudinal direction) so that the whole body of the subject P can be photographed. The top plate 33 is made of, for example, carbon fiber reinforced plastic (CFRP), which has good X-ray transparency and physical properties such as rigidity and strength. Further, for example, the inside of the top plate 33 is hollow.

The support frame 34 supports the top plate 33 so as to be movable in the longitudinal direction of the top plate 33. In addition to the top plate 33, the bed driving device 32 may move the support frame 34 in the longitudinal direction of the top plate 33. Note that the bed 30 is an example of a medical bed device.

For example, in a medical device including a bed 30, an electrocardiograph or a respiratory synchronization device may be placed on the top plate 33 of the bed 30 to photograph the subject P. In such cases, the power cables of the electrocardiograph and respiratory synchronization device are connected to an outlet installed on the wall of the examination room or to an outlet installed on the bed.

However, when connecting the power cable to a wall outlet, the power cable becomes an obstacle when moving the top plate 33 in the Z-axis direction. Further, when installing an outlet on the bed 30, a separate movable cable that moves when the top plate 33 is operated is required, and for example, there is a possibility that the movable cable is damaged while the top plate 233 is operated. Therefore, the bed 30 according to the embodiment is provided with a battery for supplying power to the electrocardiograph and the respiratory synchronization device.

Here, the battery provided in the bed 30 will be explained using FIGS. 2 and 3. 2 and 3 are diagrams schematically showing an example of the positions of the top plate 33 and the battery 35 of the medical bed apparatus according to the embodiment.

The battery 35 is provided on the bed 30 and moves together with the top plate 33. For example, the battery 35 is provided, for example, at one end of the top plate 33 in the longitudinal direction farthest from the pedestal 10 so as not to enter the X-ray irradiation range of the X-ray tube 11 . The battery 35 supplies power to the biological information detection device 351 via the first power cable 352. The first power cable 352 is, for example, a two-pronged outlet connection cable that can be connected to the battery 35. Note that the first power cable 352 may be any connection cable that can be connected to the battery 35, and may be a USB connection cable, and is not limited thereto.

The biological information detection device 351 detects biological information of the subject P. For example, the biological information detection device 351 corresponds to an electrocardiograph when the biological information is an electrocardiographic waveform. At this time, the biological information detection device 351 outputs the electrocardiographic waveform of the subject P to the processing circuit 44, which will be described later. Note that the biological information is not limited to electrocardiographic waveforms, and may be, for example, respiratory waveforms, pulse waveforms, etc. In these cases, the biological information detection device 351 corresponds to a respiratory waveform detector, a pulse wave meter, or the like.

Furthermore, the biological information detection device 351 is not limited to one measuring device, and may include, for example, an electrocardiograph and a respiratory waveform detector. At this time, the electrocardiograph outputs the electrocardiographic waveform of the subject P to a processing circuit 44, which will be described later, and the respiratory waveform detector outputs the respiratory waveform of the subject P to the processing circuit 44. Since a known device can be applied as the biological information detection device 351, a description thereof will be omitted.

Further, when the battery 35 reaches a predetermined position, it is charged from a charger 36 provided on the support frame 34. Specifically, the battery 35 is charged from the charger 36 when the top plate 33 is located at the out limit (see FIG. 2).

The charger 36 is provided on the bed 30, for example. Specifically, the charger 36 is provided, for example, at one end of the top plate 33 far from the pedestal 10 among both ends of the bed 30 in the longitudinal direction. Charger 36 supplies power to battery 35 via second power cable 361. The second power cable 361 is connected to the pedestal 10 .

Here, the timing at which the battery 35 is charged from the charger 36 will be explained using FIG. 4. FIG. 4 is a diagram schematically showing an example for explaining the timing at which the battery 35 is charged from the charger 36 of the medical bed apparatus according to the embodiment. The top plate 33 and support frame 34 shown in FIG. 4 show a state in which the top plate 33 is not located at the out limit.

The top plate 33 includes a first terminal 331. The first terminal 331 is a member for electrically connecting the battery 35 and charger 36. For example, the first terminal 331 is a metal plate spring and is an electrode. The first terminal 331 is provided on one end side of the top plate 33 far from the pedestal 10. Further, the first terminal 331 is provided on the lower side of the top plate 33. Further, the first terminal 331 is electrically connected to the battery 35 .

The support frame 34 includes a second terminal 341. The second terminal 341 is a member for electrically connecting the battery 35 and charger 36. For example, the second terminal 341 is a metal electrode. The second terminal 341 is provided on one end side of the support frame 34 far from the pedestal 10. Further, the second terminal 341 is provided on the upper side of the support frame 34. Further, the second terminal 341 is electrically connected to the charger 36.

For example, when the top plate 33 shown in FIG. 4 moves to the negative side in the Z-axis direction and the top plate 33 is located at the out limit, the first terminal 331 as a leaf spring comes into contact with the second terminal 341 while being elastically deformed. When the first terminal 331 provided on the top plate 33 and the second terminal 341 provided on the support frame 34 come into contact with each other, the charger 36 starts charging the battery 35 according to a charging control function 445 described later. do.

The first terminal 331 is electrically connected to the battery 35 , and the second terminal 341 is electrically connected to the charger 36 . Therefore, when the first terminal 331 and the second terminal 341 come into contact, the battery 35 and the charger 36 are electrically connected. Thereby, the charger 36 supplies power to the battery 35. Note that the form of the first terminal 331 is not limited to a metal leaf spring, as long as the battery 35 and the charger 36 can be electrically connected by contacting the second terminal 341.

Return to Figure 1. Console 40 has memory 41 , display 42 , input interface 43 and processing circuitry 44 . Data communication between the memory 41, display 42, input interface 43, and processing circuit 44 is performed via a bus (BUS). Although the console 40 will be described as being separate from the pedestal 10, the pedestal 10 may include the console 40 or a part of each component of the console 40. Here, the console 40 is an example of a medical bed control device.

The memory 41 is realized by, for example, a ROM, a RAM, a semiconductor memory device such as a flash memory, a hard disk, an optical disk, or the like. Further, for example, the memory 41 stores various programs. Note that the storage area of the memory 41 may be located within the X-ray computed tomography apparatus 1 or may be located within an external storage device connected via a network. Here, the memory 41 is an example of a storage section.

The display 42 displays various information. For example, the display 42 displays a medical image (CT image) generated by the processing circuit 44, a GUI (Graphical User Interface) for accepting various operations from an operator, and the like. The information displayed on the display 42 includes notification information for bed control according to the embodiment. As the display 42, various arbitrary displays can be used as appropriate.

For example, as the display 42, a liquid crystal display (LCD), a cathode ray tube (CRT) display, an organic EL display (OELD), or a plasma display can be used.

Note that the display 42 may be provided anywhere in the control room. Further, the display 42 may be provided on the pedestal 10. Further, the display 42 may be of a desktop type, or may be configured of a tablet terminal or the like that can communicate wirelessly with the main body of the console 40. Furthermore, one or more projectors may be used as the display 42. Here, the display 42 is an example of a display section.

The input interface 43 receives various input operations from an operator, converts the received input operations into electrical signals, and outputs the electrical signals to the processing circuit 44 . For example, the input interface 43 receives imaging conditions, reconstruction conditions for reconstructing CT image data, image processing conditions for CT image data, etc. from the operator.

As the input interface 43, for example, a mouse, keyboard, trackball, switch, button, joystick, touch pad, touch panel display, etc. can be used as appropriate.

Note that in this embodiment, the input interface 43 is not limited to one that includes these physical operation components. For example, examples of the input interface 43 include an electrical signal processing circuit that receives an electrical signal corresponding to an input operation from an external input device provided separately from the device and outputs this electrical signal to the processing circuit 44. .

Further, the input interface 43 may be provided on the gantry 10 and/or the bed 30. Furthermore, the input interface 43 may be configured with a tablet terminal or the like that can communicate wirelessly with the console 40 main body. Here, the input interface 43 is an example of an input section.

The processing circuit 44 controls the overall operation of the X-ray computed tomography apparatus 1 . The processing circuit 44 includes a processor and memory such as ROM and RAM as hardware resources. The processing circuit 44 executes a system control function 441, an image generation function 442, an image processing function 443, a position detection function 444, a charging control function 445, a display control function 446, etc. using a processor that executes a program loaded into the memory. . Here, the processing circuit 44 is an example of a processing section.

In the system control function 441 , the processing circuit 44 controls various functions of the processing circuit 44 based on input operations received from the operator via the input interface 43 . For example, the processing circuit 44 controls the position of the top plate 33 of the bed 30. The processing circuit 44 controls the CT scan performed on the gantry 10. The processing circuit 44 also acquires detection data obtained by CT scan. Note that the processing circuit 44 may acquire detection data regarding the subject P from outside the X-ray computed tomography apparatus 1.

In the image generation function 442, the processing circuit 44 performs preprocessing such as logarithmic conversion processing, offset correction processing, inter-channel sensitivity correction processing, and beam hardening correction on the detection data output from the data collection circuit 18. generate. The processing circuit 44 stores the generated data in the memory 41.

Note that the data before preprocessing (detection data) and the data after preprocessing may be collectively referred to as projection data. The processing circuit 44 performs reconstruction processing on the generated projection data (projection data after preprocessing) using a filtered back projection method, a successive approximation reconstruction method, machine learning, etc., to convert the CT image data into CT image data. generate. The processing circuit 44 stores the generated CT image data in the memory 41.

In the image processing function 443, the processing circuit 44 converts the CT image data generated by the image generation function 442 into tomographic image data of an arbitrary cross section based on the input operation received from the operator via the input interface 43. or convert it into 3D image data. For example, the processing circuit 44 performs three-dimensional image processing such as volume rendering, surface rendering, image value projection processing, MPR (Multi-Planar Reconstruction) processing, and CPR (Curved MPR) processing on the CT image data to perform arbitrary processing. Generate rendering image data in the viewpoint direction.

Note that the image generation function 442 may directly generate three-dimensional image data such as rendered image data in an arbitrary viewpoint direction, that is, volume data. The processing circuit 44 stores tomographic image data and three-dimensional image data in the memory 41.

In the position detection function 444, the processing circuit 44 detects the position of the top plate 33 according to the embodiment. Specifically, the processing circuit 44 detects the relative positions of the top plate 33 and the support frame 34 in the longitudinal direction of the top plate 33 with respect to the pedestal 10 .

In the charging control function 445, the processing circuit 44 controls charging of the battery 35 using the charger 36. Specifically, the processing circuit 44 determines that when the top plate 33 is located at the out limit (an example of a reference position) in longitudinal movement and the electrical connection between the battery 35 and the charger 36 is established, The battery 35 is charged by controlling the charger 36. Furthermore, in the charging control function 445, the processing circuit 44 controls the charger 36 based on the position information obtained by the position detection function 444, using the fact that the battery 35 is placed at a predetermined position relative to the charger 36 as a trigger. The battery 35 can also be charged.

In addition, in the charging control function 445, the processing circuit 44 controls the charger 36 at a predetermined timing before the top plate moves when the top plate 33 moves in the longitudinal direction from the out limit during shooting preparation or shooting. Charging of the battery 35 is stopped. Furthermore, in the charging control function 445, the processing circuit 44 controls the charger 36 to stop supplying power to the battery 35 when the battery 35 becomes fully charged. The charger 36 supplies power to the battery 35 when the top plate 33 is located at the out limit. That is, the battery 35 is in a state where the top plate 33 is located at the out limit and electrical connection with the charger 36 is established during the standby time of the device between inspections, the time until the start of the next day's inspection, etc. If it is, it will always be able to be charged. Therefore, it is possible to prevent the battery 35 from being insufficiently charged when the biological information detection device 351 is used, without requiring any work for charging by the user.

In the display control function 446, the processing circuit 44 causes the display 42 to display an image based on various image data generated by the image processing function 443. Further, the images displayed on the display 42 include a CT image based on CT image data, a cross-sectional image based on cross-sectional image data of an arbitrary cross section, a rendered image in an arbitrary viewpoint direction based on rendered image data in an arbitrary viewpoint direction, and the like. Furthermore, the images displayed on the display 42 include images for displaying an operation screen and images for displaying notifications and warnings to the operator. Here, the processing circuit 44 that implements the display control function 446 is an example of a display control section.

Note that each of the functions 441 to 446 is not limited to being implemented by a single processing circuit. The processing circuit 44 may be configured by combining a plurality of independent processors, and the functions 441 to 446 may be realized by each processor executing each program. Here, each of the functions 441 to 446 may be realized by being distributed or integrated in a single or multiple processing circuits as appropriate.

Note that although the console 40 has been described as a single console that executes a plurality of functions, the plurality of functions may be executed by separate consoles. For example, the functions of the processing circuit 44, such as the image generation function 442, the image processing function 443, the position detection function 444, and the charging control function 445, may be distributed.

Note that part or all of the processing circuit 44 is not limited to being included in the console 40, but may be included in an integrated server that collectively processes detection data acquired by multiple medical image diagnostic apparatuses. .

Note that at least one of the post-processing and display processing may be performed on either the console 40 or an external workstation. Further, processing may be performed simultaneously on both the console 40 and the workstation. As the workstation, for example, a computer having hardware resources such as a processor that implements functions corresponding to each process and memory such as ROM or RAM can be used as appropriate.

The word "processor" used in the above description means, for example, a circuit such as a CPU, a GPU (Graphics Processing Unit), an ASIC, or a programmable logic device (PLD). PLD includes simple programmable logic device (SPLD), complex programmable logic device (CPLD), and field programmable gate array (field programmable gate array). te Array: FPGA). A processor realizes its functions by reading and executing a program stored in a memory circuit. The storage circuit in which the program is stored is a computer-readable non-transitory storage medium.

Note that instead of storing the program in the memory circuit, the program may be directly incorporated into the circuit of the processor. In this case, the processor realizes its functions by reading and executing a program built into the circuit. Further, instead of executing a program, functions corresponding to the program may be realized by a combination of logic circuits. Note that each processor of this embodiment is not limited to being configured as a single circuit for each processor, but may also be configured as a single processor by combining multiple independent circuits to realize its functions. good. Furthermore, a plurality of components in FIG. 1 may be integrated into one processor to realize its functions.

Note that in reconstructing X-ray CT image data, either a full-scan reconstruction method or a half-scan reconstruction method may be applied. For example, in the image generation function 442, the processing circuit 44 uses projection data for 360 degrees around the subject P in the full scan reconstruction method. Further, in the half-scan reconstruction method, the processing circuit 44 uses projection data for 180 degrees + fan angle. In the following, for ease of explanation, it is assumed that the processing circuit 44 uses a full scan reconstruction method in which projection data for 360 degrees around the subject P is used for reconstruction.

Note that the technology according to this embodiment can be applied to both a single-tube type X-ray computed tomography apparatus and a so-called multi-tube type X-ray apparatus in which multiple pairs of X-ray tubes and detectors are mounted on a rotating ring. It is also applicable to computerized tomography devices.

Note that the technology according to this embodiment is also applicable to an X-ray computed tomography apparatus 1 configured to perform imaging using a dual energy method. At this time, the X-ray high voltage device 14 can alternately switch the energy spectrum of the X-rays emitted from the X-ray tube 11, for example, by high-speed switching of two types of voltage values. That is, the X-ray computed tomography apparatus 1 is configured to be able to collect projection data in each acquisition view while modulating the tube voltage at the timing according to the control signal for tube voltage modulation. By photographing the subject P at different tube voltages, it is possible to improve the gray contrast in the CT image based on the energy transmittance of the substance for each X-ray energy spectrum.

Note that the X-ray computed tomography apparatus 1 according to this embodiment is configured to read out electrical signals from the X-ray detector 12 using a sequential readout method.

Note that the X-ray computed tomography apparatus 1 according to the present embodiment may be configured as a mobile CT in which the gantry 10 and bed 30 are movable.

Note that the bed control according to the embodiment is realized, for example, by the console 40 of the X-ray computed tomography apparatus 1, but may also be realized by the control device 15, or by a computer mounted on the gantry 10 or the bed 30. I don't care if it comes true.

As described above, the X-ray computed tomography apparatus 1 according to the present embodiment includes the pedestal 10 and the top plate 33 on which the subject P is placed, and the bed 30 that moves the top plate 33 into the hollow of the pedestal 10. and a battery 35 that is provided on the bed 30 and moves together with the top plate 33. Further, the battery 35 according to the present embodiment is electrically connected to the charger 36 and charged by the charger 36 when the top plate 33 is placed at the reference position.

According to at least one embodiment described above, for example, by connecting the first power cable 352 of the biological information detecting device 351 to the battery 35, power can be supplied to the biological information detecting device 351. Thereby, the biological information detection device 351 can be placed on the top plate of the bed 30 and used while photographing the subject P. Further, since the first power cable 352 of the biological information detection device 351 is connected to the battery 35, it can follow the top plate 33 even if the top plate 33 moves.

For example, when the top plate 33 is placed at the reference position, the battery 35 is electrically connected to the charger 36 and charged by the charger 36, so that the battery 35 is charged when the biological information detection device 351 is used. It is possible to suppress the shortage. Therefore, the X-ray computed tomography apparatus 1 according to the present embodiment can improve the convenience of power supply to the biological information detection apparatus 351 during imaging using a medical image diagnostic apparatus compared to the conventional apparatus.

(Modified example of embodiment)
In the above embodiment, the battery 35 starts charging when the first terminal 331 provided on the top plate 33 and the second terminal 341 provided on the support frame 34 come into contact with each other. In contrast, the top plate 33 is provided with a charging part that is electrically connected to the battery 35, and the support frame 34 is provided with a power transmission part that is electrically connected to an external power source, so that the charging part and the power transmission part overlap (the top plate 33 is out of the way). (located at the limit), the charger 36 may wirelessly charge the battery 35. Note that since a known device for wireless charging can be applied, a description thereof will be omitted.

Thereby, when the top plate 33 is placed at the reference position, the battery 35 is electrically connected to the charger 36 and charged by the charger 36, so that when the biological information detection device 351 is used, the battery 35 is not fully charged. can be suppressed.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

Regarding the above embodiments, the following additional notes are disclosed as one aspect and optional features of the invention.

(Additional note 1)
A pedestal and
a bed having a top plate on which the subject is placed and moving the top plate into the hollow of the mount;
a battery that is provided on the bed and moves together with the top plate;
An X-ray computed tomography apparatus comprising:

(Additional note 2)
The battery may be provided at one end of the top plate, which is far from the pedestal, among both ends of the top plate in the longitudinal direction.

(Additional note 3)
The bed may include a charger that charges the battery.

(Additional note 4)
The charger may be electrically connected to the battery by wire or wirelessly to charge the battery when the top plate is placed at the reference position.

(Appendix 5)
a top plate that is movable in the longitudinal direction and on which the subject is placed;
a battery that moves together with the top plate;
A medical bed device comprising:

1 X-ray computed tomography device (medical image diagnostic device)
10 Frame 11 X-ray tube 12 X-ray detector 13 Rotating frame 14 X-ray high voltage device 15 Control device (control unit)
16 wedge 17 collimator 18 data collection circuit 19 opening 30 bed (medical bed device)
31 Base 32 Bed driving device 33 Top plate 34 Support frame 35 Battery 36 Charger 40 Console 41 Memory 42 Display 43 Input interface 44 Processing circuit 331 First terminal 341 Second terminal 441 System control function 442 Image generation function 443 Image processing function 444 Position detection function 445 Charging control function 446 Display control function

Claims (5)

A pedestal and
a bed having a top plate on which the subject is placed and moving the top plate into the hollow of the mount;
a battery that is provided on the bed and moves together with the top plate;
An X-ray computed tomography apparatus comprising: The battery is provided at one end of the top plate that is far from the pedestal among both longitudinal ends of the top plate.
The X-ray computed tomography apparatus according to claim 1. The bed has a charger that charges the battery.
The X-ray computed tomography apparatus according to claim 2. The charger is electrically wired or wirelessly connected to the battery and charges the battery when the top plate is placed at a reference position.
The X-ray computed tomography apparatus according to claim 3. a top plate that is movable in the longitudinal direction and on which the subject is placed;
a battery that moves together with the top plate;
A medical bed device comprising:

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