Bed device of medical image diagnostic apparatus and medical image diagnostic apparatus

Abstract

To prevent a foot of an operator from being sandwiched.SOLUTION: A bed device of a medical image diagnostic apparatus of an embodiment comprises a top plate, a support base, a bed driving device, and a foot switch. The top plate is rectangular. The support base supports the top table. The bed driving device moves the top plate in a vertical direction and in a horizontal direction crossing a longitudinal direction of the top plate. The foot switch receives an operation by an operator concerning driving of the bed driving device. The foot switch is provided at the support table.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The embodiments disclosed in the present specification and drawings relate to a bed device for a medical image diagnostic apparatus and a medical image diagnostic apparatus. [Background technology]

[0002] A medical image diagnostic device such as an X-ray CT device includes, for example, a bed device on which a subject is placed. The bed device includes, for example, a top plate that can move up, down, left, and right, and the top plate is supported by, for example, a support base. The subject to be diagnosed by the medical image diagnostic device is placed on the top plate and can move up, down, left, and right with the movement of the top plate.

[0003] The support table is mounted on a base placed on the floor, for example, and is driven by a left-right drive device provided on the base, so that it can move left-right relative to the base. The support table is provided with, for example, a vertical drive device that moves the tabletop up and down. The tabletop is moved up and down relative to the support table by the vertical movement device, and moved left-right by the horizontal movement device in conjunction with the movement of the support table.

[0004] The bed device is provided with, for example, a foot pedal for moving the tabletop up and down and left and right. The foot pedal is provided in a form placed on the floor surface so that it can be operated by the foot of an operator such as a technician. For this reason, the foot pedal is attached to, for example, a base. For this reason, when the support platform moves left and right, for example, the operator's foot may be pinched between the support platform and the floor surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-187124 A Summary of the Invention [Problem to be solved by the invention]

[0006] The problem to be solved by the embodiments disclosed in this specification and the drawings is to prevent the operator's feet from being pinched. However, the problem to be solved by the embodiments disclosed in this specification and the drawings is not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described below can also be positioned as other problems. [Means for solving the problem]

[0007] The bed device of the medical image diagnostic apparatus of the embodiment has a tabletop, a support base, a bed drive device, and a foot switch. The tabletop is elongated. The support base supports the tabletop, and the bed drive device moves the tabletop in a vertical direction and a horizontal direction intersecting the longitudinal direction of the tabletop. The foot switch accepts an operator's operation related to the drive of the bed drive device. The foot switch is provided on the support base. [Brief description of the drawings]

[0008] [Figure 1] 1 is a configuration diagram of an X-ray CT apparatus 1 according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing an example of a bed device 20. [Diagram 3] FIG. 2 is a front view showing an example of the bed device 20. [Figure 4] FIG. 2 is a cross-sectional view showing an example of the bed device 20 cut along the XY plane. [Diagram 5] FIG. 2 is a side view showing an example of the foot switch 30. [Figure 6] 4A and 4B are diagrams for explaining the relationship between the position of the top plate 23 and the switch mounting member 34 on which the foot switch 30 is mounted in the first embodiment. [Figure 7] 13A and 13B are diagrams illustrating a state in which the switch mounting member 34 lowers the foot switch 30. [Figure 8] 13 is a diagram for explaining the relationship between the position of the top board 23 and the reaction position of the foot switch 30 in the second embodiment. FIG. [Figure 9] 1A to 1C are diagrams showing examples of the foot switch 30 installed in different orientations. [Figure 10] 13A and 13B are diagrams for explaining the relationship between the position of the top board 23 and the foot switch 30 in the third embodiment. [Figure 11] 13A and 13B are diagrams for explaining the relationship between the position of the top plate 23 and the foot switch device 26 that is popped out by the pop-out mechanism in the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a bed device and a medical image diagnostic device of an embodiment will be described with reference to the drawings. In the embodiment, the medical image diagnostic device is an X-ray CT device, but the medical image diagnostic device may be another device. For example, the medical image diagnostic device may be an MRI device, a nuclear medicine diagnosis system, or an X-ray angiography.

[0010] (First embodiment) 1 is a configuration diagram of an X-ray CT apparatus 1 according to the first embodiment. The X-ray CT apparatus 1 includes, for example, a gantry apparatus 10, a bed apparatus 20, and a console apparatus 40. The X-ray CT apparatus 1 captures contrast CT images for performing image diagnosis. The X-ray CT apparatus 1 is an example of a medical image diagnostic apparatus.

[0011] The gantry 10 includes, for example, an X-ray tube 11, a wedge 12, a collimator 13, an X-ray high voltage device 14, an X-ray detector 15, a data acquisition system (hereinafter, referred to as DAS: Data Acquisition System) 16, a rotating frame 17, and a control device 18. The bed 20 includes, for example, a support table 21, a bed driving device 22, a tabletop 23, a support frame 24, a base 25, and a foot switch device 26. The console device 40 includes, for example, a memory 41, a display 42, an input interface 43, and a processing circuit 50. In the first embodiment, the console device 40 is described as being separate from the gantry 10, but the gantry 10 may include some or all of the components of the console device 40.

[0012] 1 shows both the Z-axis direction and the X-axis direction of the gantry 10 for convenience of explanation, but in reality, there is only one gantry 10. In the first embodiment, the rotation axis of the rotating frame 17 in the non-tilted state or the longitudinal direction of the tabletop 23 of the bed 20 is defined as the Z-axis direction, the axis perpendicular to the Z-axis direction and horizontal to the floor surface is defined as the X-axis direction, and the direction perpendicular to the Z-axis direction and perpendicular to the floor surface is defined as the Y-axis direction. In the following explanation, the direction along the Z-axis is defined as the front-rear direction, the direction along the X-axis is defined as the left-right direction, and the direction along the Y-axis is defined as the up-down direction.

[0013] The X-ray tube 11, wedge 12, collimator 13, X-ray high voltage device 14, X-ray detector 15, DAS 16, rotating frame 17, and control device 18 in the gantry device 10 are housed in, for example, a gantry. The X-ray tube 11 generates X-rays by irradiating thermoelectrons from a cathode (filament) to an anode (target) when a high voltage is applied from the X-ray high voltage device 14. The X-ray tube 11 includes a vacuum tube. For example, the X-ray tube 11 is a rotating anode type X-ray tube that generates X-rays by irradiating a rotating anode with thermoelectrons. The X-ray tube 11 irradiates X-rays to a subject P placed on a top plate 23.

[0014] The wedge 12 is a filter for adjusting the amount of X-rays irradiated from the X-ray tube 11 to the subject P who is the subject of image diagnosis. The wedge 12 attenuates the X-rays passing through it so that the distribution of the amount of X-rays irradiated from the X-ray tube 11 to the subject P becomes a predetermined distribution. The wedge 12 is also called a wedge filter or a bow-tie filter. The wedge 12 is, for example, made by processing aluminum so as to have a predetermined target angle and a predetermined thickness.

[0015] The collimator 13 is a mechanism for narrowing down the irradiation range of the X-rays transmitted through the wedge 12. The collimator 13 narrows down the irradiation range of the X-rays, for example, by forming a slit by combining multiple lead plates. The collimator 13 may also be called an X-ray aperture. The narrowing range of the collimator 13 may be mechanically drivable.

[0016] The X-ray high voltage device 14 has, for example, a high voltage generator and an X-ray control device. The high voltage generator has an electric circuit including a transformer and a rectifier, and generates a high voltage to be applied to the X-ray tube 11. The X-ray control device controls the output voltage of the high voltage generator according to the amount of X-rays to be generated by the X-ray tube 11. The high voltage generator may be one that boosts the voltage using the above-mentioned transformer, or one that boosts the voltage using an inverter. The X-ray high voltage device 14 may be provided on the rotating frame 17, or may be provided on the side of the fixed frame (not shown) of the gantry device 10.

[0017] The X-ray detector 15 detects the intensity of X-rays generated by the X-ray tube 11 and incident upon the subject P. The X-ray detector 15 outputs an electrical signal (which may be an optical signal, etc.) corresponding to the intensity of the detected X-rays to the DAS 16. The X-ray detector 15 has, for example, multiple rows of X-ray detection elements. Each of the multiple rows of X-ray detection elements has multiple X-ray detection elements arranged in the channel direction along an arc centered on the focal point of the X-ray tube 11. The multiple rows of X-ray detection elements are arranged in the slice direction (column direction, row direction).

[0018] The X-ray detector 15 is an indirect detector having, for example, a grid, a scintillator array, and an optical sensor array. The scintillator array has a plurality of scintillators. Each scintillator has a scintillator crystal. The scintillator crystal emits an amount of light according to the intensity of the incident X-ray. The grid is disposed on the surface of the scintillator array on which the X-ray is incident, and has an X-ray shielding plate having a function of absorbing scattered X-rays. The grid may also be called a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array has, for example, an optical sensor such as a photomultiplier tube (PMT). The optical sensor array outputs an electric signal according to the amount of light emitted by the scintillator. The X-ray detector 15 may be a direct conversion detector having a semiconductor element that converts the incident X-ray into an electric signal.

[0019] The DAS 16 includes, for example, an amplifier, an integrator, and an A / D converter. The amplifier performs an amplification process on the electrical signal output by each X-ray detection element of the X-ray detector 15. The integrator integrates the amplified electrical signal over a view period. The A / D converter converts an electrical signal indicating the integration result into a digital signal. The DAS 16 outputs detection data based on the digital signal to the console device 40.

[0020] The rotating frame 17 is an annular rotating member that rotates the X-ray tube 11, the wedge 12, the collimator 13, and the X-ray detector 15 while holding them facing each other. The rotating frame 17 is supported by a fixed frame so as to be rotatable around the subject P introduced inside. The rotating frame 17 also supports the DAS 16. Detection data output by the DAS 16 is transmitted by optical communication from a transmitter having a light-emitting diode (LED) provided on the rotating frame 17 to a receiver having a photodiode provided on a non-rotating part (e.g., the fixed frame) of the gantry device 10, and is transferred to the console device 40 by the receiver. Note that the method of transmitting detection data from the rotating frame 17 to the non-rotating part is not limited to the above-mentioned method using optical communication, and any non-contact type transmission method may be adopted. The rotating frame 17 is not limited to an annular member, and may be an arm-like member as long as it can support and rotate the X-ray tube 11, etc.

[0021] The X-ray CT device 1 is, for example, a Rotate / Rotate-type X-ray CT device (third generation CT) in which both the X-ray tube 11 and the X-ray detector 15 are supported by a rotating frame 17 and rotate around the subject P, but is not limited to this and may be a Stationary / Rotate-type X-ray CT device (fourth generation CT) in which multiple X-ray detection elements arranged in a circular ring are fixed to a fixed frame and the X-ray tube 11 rotates around the subject P.

[0022] The control device 18 has, for example, a processing circuit having a processor such as a CPU (Central Processing Unit), and a driving mechanism including a motor, an actuator, etc. The processing circuit realizes these functions by, for example, a hardware processor executing a program stored in a storage device (storage circuit).

[0023] The control device 18 moves the tabletop 23 in the up-down direction and the support base 21 in the left-right direction based on the first detection signal and the second detection signal transmitted by the foot switch device 26. Each component of the control device 18 may be distributed and realized by multiple pieces of hardware. The control device 18 may be provided in the gantry device 10 or in the console device 40.

[0024] The bed device 20 is a device on which a subject P to be scanned is placed and introduced into the rotating frame 17 of the gantry device 10. Fig. 2 is a perspective view showing an example of the bed device 20. Fig. 3 is a front view showing an example of the bed device 20. Fig. 4 is a cross-sectional view showing an example of the bed device 20 cut along the XY plane.

[0025] The support table 21 in the bed device 20 includes a base member 21A and a flexible cover 21B. The base member 21A is mounted on a pedestal 25 placed on the floor surface and is movable in the left-right direction relative to the pedestal 25. The support table 21 moves as the base member 21A moves.

[0026] The flexible cover 21B is provided on the base member 21A and is movable in the left-right direction together with the base member 21A. The center position in the left-right direction of the base 25 is a reference position BP that serves as a reference when the support table 21 moves in the left-right direction. The support table 21 is movable leftward and rightward from the reference position BP.

[0027] The bed driving device 22 is provided on the pedestal 25 via the base member 21A of the support table 21, and is covered by a flexible cover 21B. The support table 21 and the bed driving device 22 support the tabletop 23. The bed driving device 22 includes, for example, a vertical direction driving device 22A and a horizontal direction driving device 22B.

[0028] The bed drive device 22 moves the top board 23 in the vertical direction by the vertical drive device 22A, and moves the top board 23 in the horizontal direction together with the support base 21 by the horizontal drive device 22B. The support base 21 and the top board 23 are movable, for example, to the left and right from a reference position that is set to the center position of the range in which they can be moved in the horizontal direction. The reference position may be set anywhere within the range in which they can be moved in the horizontal direction, and the support base 21 and the top board 23 may be movable only to the right or left from the reference position.

[0029] The top plate 23 is attached to the vertical drive device 22A. The vertical drive device 22A telescopically extends and retracts. When the vertical drive device 22A extends, the top plate 23 rises, and when the vertical drive device 22A contracts, the top plate 23 descends. The vertical drive device 22A may be of another type, for example, one that uses an X-link to move the top plate 23 in the vertical direction. The vertical drive device 22A can be operated, for example, by a motor or actuator that serves as a vertical drive source.

[0030] The left-right direction drive device 22B includes, for example, a slider. The slider is fixed to the upper surface of the base 25 and moves along a rail member extending in the left-right direction. The left-right direction drive device 22B moves the support base 21 in the left-right direction relative to the base 25 by the left-right movement of the slider. The left-right direction drive device 22B can be operated, for example, by a motor or an actuator that serves as a left-right direction drive source. The up-down direction drive source and the left-right direction drive source may be separate entities or may be a common entity.

[0031] The top board 23 is a plate-like member on which the subject P is placed, and has an elongated shape in a plan view. The elongated shape means a shape in which the length in one direction is longer than the lengths in other directions, such as a rectangle. In addition to a rectangle, the elongated shape includes a shape in which some or all of the four corners of a rectangle are chamfered, a shape in which the straight lines of a rectangle are curved, a trapezoid whose height direction is longer than its upper and lower sides, and the like. The top board 23 is supported by a flexible cover 21B of the support base 21 and a vertical direction drive device 22A of the bed drive device 22.

[0032] The support frame 24 is interposed between the top plate 23 and the flexible cover 21B and the vertical drive device 22A. The top plate 23 can be moved up and down together with the support frame 24 by the vertical drive device 22A in the bed drive device 22. The top plate 23 can be moved left and right together with the support frame 24 by the horizontal drive device 22B in the bed drive device 22. The top plate 23 can be moved in the front-rear direction relative to the support frame 24. The front-rear direction is the longitudinal direction of the top plate 23, and the left-right direction is a direction that intersects with, for example is perpendicular to, the longitudinal direction of the top plate 23.

[0033] The base 25 is placed, for example, on the floor surface of an examination room. The base 25 has a certain degree of thickness. The base 25 is fixed to the floor surface near the opening of the gantry device 10. A notch 25A into which the foot switch device 26 enters is formed on each of the left and right sides of the base 25. Since the notch 25A is formed, the foot switch device 26 can reach a height position of the floor surface.

[0034] The foot switch device 26 is an input device for an operator to operate the bed device 20 in the vicinity of the subject P. The foot switch devices 26 are provided on each of the long sides (left and right sides) of the top board 23 of the base member 21A. The foot switch devices 26 provided on the right and left sides of the top board 23 of the base member 21A have the same configuration. Here, the configuration of the foot switch device 26 provided on the right side will be described.

[0035] Foot switch device 26 includes, for example, a first foot switch 31 and a second foot switch 32 as foot switch 30. In addition to foot switch 30, foot switch device 26 includes, for example, a support bracket 33 and a switch mounting member 34 (see FIG. 5).

[0036] The first foot switch 31 and the second foot switch 32 in the foot switch 30 are provided adjacent to each other and have a common form. The foot switch 30 accepts an operation by an operator regarding the driving of the bed driving device 22. In the first embodiment, the foot switch 30 includes two foot switches, the first foot switch 31 and the second foot switch 32, but may include only one foot switch or three or more foot switches.

[0037] 5 is a side view showing an example of the foot switch 30. The first foot switch 31 and the second foot switch 32 each have the structure shown in the foot switch 30. The foot switch 30 includes, for example, an operator 30A, a swing shaft 30B, a switch base 30C, and a detection unit 30D. The operator 30A is a member that is operated by an operator. An end of the operator 30A that is farther from the reference position is swingably attached to the switch base 30C via the swing shaft 30B.

[0038] A detection unit 30D is provided at an end of the switch base 30C farther from the reference position. The operator operates the first foot switch 31, for example, by stepping on the operation element 30A with the sole of the foot. When the operation element 30A stepped on by the operator reaches the detection unit 30D, the detection unit 30D detects the detected part 30E at the end of the operation element 30A close to the reference position.

[0039] Upon detecting the detected portion 30E, the detecting portion 30D transmits a detection signal to the control device 18. Upon receiving the detection signal, the control device 18 accepts the operation of the foot switch 30. Upon accepting the operation of the foot switch 30, the control device 18 moves the support base 21 and the top board 23.

[0040] The control device 18 accepts the operation of the first foot switch 31, for example, by receiving a detection signal (hereinafter, the first detection signal) transmitted by the detection unit 30D in the first foot switch 31. By accepting the operation of the first foot switch 31, the control device 18 drives and controls the vertical direction drive device 22A to move the tabletop 23 in the vertical direction.

[0041] The control device 18 accepts the operation of the second foot switch 32, for example, by receiving a detection signal (hereinafter, second detection signal) transmitted by the detection unit 30D in the second foot switch 32. By accepting the operation of the second foot switch 32, the control device 18 drives and controls the left-right direction drive device 22B to move the support base 21 and the tabletop 23 in the left-right direction.

[0042] The foot switch 30 is attached to a support bracket 33, which is fixed to a base member 21A of the support stand 21. In other words, the foot switch 30 is suspended from the support stand 21 via the support bracket 33 fixed to the support stand 21. The support bracket 33 to which the first foot switch 31 and the second foot switch 32 are attached may be common or independent.

[0043] As shown in Fig. 5, the support bracket 33 to which the foot switch 30 is attached includes a mounting plate 33A extending in the vertical direction and a support plate 33B protruding outward in the left-right direction from the lower end of the mounting plate 33A, and the foot switch 30 is placed on the support plate 33B. The base member 21A shown in Fig. 3 is disposed at a position higher than the floor surface by the height of the pedestal 25, but the foot switch 30 is disposed at approximately the same height as the floor surface because it is placed on the support plate 33B provided at the lower end of the mounting plate 33A. This makes it easy for the operator to step on the foot switch 30.

[0044] The switch mounting member 34 is disposed between the foot switch 30 and the support plate 33B of the support bracket 33. The switch mounting member 34 mounts the foot switch 30 in a state in which the tilt angle around an axis parallel to the oscillation axis 30B is adjustable. The switch mounting member 34 includes a driving member such as a motor or actuator (not shown). The tilt angle of the switch mounting member 34 is the angle formed between the attachment plate 33A and the support plate 33B.

[0045] The angle of the switch mounting member 34 can be adjusted by the control device 18 controlling the drive member. The control device 18 adjusts the tilt angle of the switch mounting member 34 based on the left-right position of the top plate 23. For example, the control device 18 adjusts the tilt angle of the switch mounting member 34 to a greater extent the farther the position of the top plate 23 is from the reference position. The switch mounting member 34 is an example of an angle adjustment member.

[0046] The memory 41 in the console device 40 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory), a flash memory, a hard disk, an optical disk, etc. The memory 41 stores, for example, detection data, projection data, reconstructed image data, CT image data, etc. These data may be stored in an external memory with which the X-ray CT apparatus 1 can communicate, instead of the memory 41 (or in addition to the memory 41). The external memory is controlled by a cloud server that manages the external memory, for example, by the cloud server accepting a read / write request.

[0047] The display 42 displays various types of information. For example, the display 42 displays medical images (CT images) generated by a processing circuit, GUI images that accept various operations by an operator such as a doctor or an engineer, and the like. The display 42 is, for example, a liquid crystal display, a CRT (Cathode Ray Tube), an organic EL (Electroluminescence) display, or the like. The display 42 may be provided on the gantry device 10. The display 42 may be a desktop type, or may be a display device (for example, a tablet terminal) that can wirelessly communicate with the main body of the console device 40.

[0048] The input interface 43 accepts various input operations by an operator and outputs an electrical signal indicating the content of the accepted input operation to the processing circuitry 50. For example, the input interface 43 accepts input operations such as collection conditions when collecting detection data or projection data, reconstruction conditions when reconstructing a CT image, and image processing conditions when generating a post-processed image from a CT image.

[0049] The input interface 43 is realized by, for example, a mouse, a keyboard, a touch panel, a drag ball, a switch, a button, a joystick, a camera, an infrared sensor, a microphone, etc. The input interface 43 may be realized by a display device (for example, a tablet terminal) capable of wireless communication with the main body of the console device 40.

[0050] In this specification, the input interface is not limited to an interface having physical operation parts such as a mouse, a keyboard, etc. For example, an example of the input interface also includes 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 the electrical signal to a control circuit.

[0051] The processing circuitry 50 has a processor such as a CPU (Central Processing Unit). The processing circuitry 50 controls the overall operation of the X-ray CT device 1. The processing circuitry 50 includes, for example, a control function 51, a pre-processing function 52, a reconstruction processing function 53, and an image processing function 54. The processing circuitry 50 realizes these functions by, for example, a hardware processor executing a program stored in a storage device (storage circuit).

[0052] The hardware processor refers to a circuit such as a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a programmable logic device (e.g., a simple programmable logic device (SPLD) or a complex programmable logic device (CPLD), or a field programmable gate array (FPGA). Instead of storing a program in a storage device, the program may be directly embedded in the circuit of the hardware processor. In this case, the hardware processor realizes a function by reading and executing the program embedded in the circuit. The hardware processor is not limited to being configured as a single circuit, and may be configured as one hardware processor by combining multiple independent circuits to realize each function. The storage device may be a non-transitory (hardware) storage medium. Furthermore, multiple components may be integrated into one hardware processor to realize each function.

[0053] Each component of the console device 40 or the processing circuit 50 may be distributed and realized by multiple pieces of hardware. The processing circuit 50 may be realized by a processing device capable of communicating with the console device 40, rather than being a component of the console device 40. The processing device is, for example, a workstation connected to one X-ray CT device, or a device (for example, a cloud server) connected to multiple X-ray CT devices and collectively executing processing equivalent to that of the processing circuit 50 described below.

[0054] Each function included in the processing circuit 50 may be distributed among multiple circuits, or may be made available by starting application software stored in the memory 41. The control function 51 controls various functions of the processing circuit 50 based on an input operation received by the input interface 43.

[0055] The pre-processing function 52 performs pre-processing such as logarithmic conversion processing, offset correction processing, inter-channel sensitivity correction processing, beam hardening correction, etc. on the detection data output by the DAS 16, generates projection data, and stores the generated projection data in the memory 41.

[0056] The reconstruction processing function 53 performs reconstruction processing using a filtered back projection method, an iterative reconstruction method, or the like on the projection data generated by the pre-processing function 52 to generate CT image data, and stores the generated CT image data in the memory 41.

[0057] The image processing function 54 converts the CT image data into three-dimensional image data or cross-sectional image data of an arbitrary cross section by a known method based on an input operation received by the input interface 43. The conversion into three-dimensional image data may be performed by the pre-processing function 52.

[0058] In the bed device 20 of the first embodiment, the foot switch 30 is provided on the left and right positions of the support base 21 and the top board 23. This allows the operator to easily operate the foot switch 30. In addition, the support base 21 moves in the left and right directions on the base 25. For this reason, for example, if the foot switch 30 is provided on the base 25 and the foot switch 30 does not move even when the support base 21 moves in the left and right directions, a user operating the foot switch 30 may have a problem in which their toes are pinched between the underside of the support base 21 and the floor surface.

[0059] In this regard, in the bed apparatus 20 of the first embodiment, the foot switch 30 is provided on the left and right positions of the support base 21. Therefore, when the support base 21 moves left and right, the foot switch 30 also moves left and right along with the movement of the support base 21. This makes it possible to prevent the operator's toes, etc., from being pinched between the support base 21 and the floor surface.

[0060] In addition, the foot switch 30 is suspended from the support base 21 via a support bracket 33 fixed to the support base 21. Therefore, even if the base 25 has a certain thickness, the foot switch 30 can be disposed at floor height. This improves the operability of the foot switch for the operator.

[0061] In addition, the base 25 is formed with a notch 25A into which the support bracket 33 enters. This prevents the shape of the support bracket 33 from becoming too large to avoid the base 25. This eliminates the need to prepare a large part as the support bracket 33, and ensures the design of the bed apparatus 20.

[0062] In the bed device 20 of the first embodiment, the state of the foot switch device 26 is adjusted based on the left-right position of the tabletop 23. The relationship between the left-right position of the tabletop 23 and the foot switch 30 in the foot switch device 26 will be described below. The foot switch device 26 is provided on the left-right position of the support base 21, and in the following description, the reference characters affixed to the respective members may be assigned with "L" to the member located on the left side and "R" to the member located on the right side.

[0063] 6 is a diagram illustrating the relationship between the position of the tabletop 23 in the first embodiment and the switch mounting member 34 on which the foot switch 30 is mounted. The control device 18 adjusts the inclination angle of the switch mounting member 34 in the foot switch device 26 based on the left-right positions of the support base 21 and the tabletop 23. When the support base 21 and the tabletop 23 are positioned at the leftmost position (LEFT-LIMIT), the left foot switch device 26L is disposed at the position farthest from the reference position BP, and the right foot switch device 26R is disposed at the position closest to the reference position BP.

[0064] When the support base 21 and the tabletop 23 are located at the reference position (CENTER), the left foot switch device 26L and the right foot switch device 26R are disposed at positions that are equidistant from the reference position BP. When the support base 21 and the tabletop 23 are located at the rightmost position (RIGHT-LIMIT), the left foot switch device 26L is disposed at the position closest to the reference position BP, and the right foot switch device 26R is disposed at the position farthest from the reference position BP.

[0065] When the left foot switch device 26L is disposed at the farthest position from the reference position BP, the control device 18 controls the left switch mounting member 34L so that the tilt angle of the left foot switch 30L is the smallest. In a similar case, the control device 18 controls the right switch mounting member 34R so that the tilt angle of the right foot switch 30R is the largest. The tilt angle of the left foot switch 30L corresponds to the tilt angle of the left switch mounting member 34L, and the tilt angle of the right foot switch 30R corresponds to the tilt angle of the right switch mounting member 34R.

[0066] When the left foot switch device 26L and the right foot switch device 26R are disposed at equal distances from the reference position BP, the control device 18 controls the left switch mounting member 34L and the right switch mounting member 34R, respectively, so that the inclination angles of the left foot switch 30L and the right foot switch 30R are medium. When the left foot switch device 26L is disposed at a position closest to the reference position BP, the control device 18 controls the left switch mounting member 34L so that the inclination angle of the left foot switch 30L is maximized. In a similar case, the control device 18 controls the right switch mounting member 34R so that the inclination angle of the right foot switch 30R is minimized.

[0067] The operator U working on the left side of the support stand 21 is located close to the left foot switch 30L when the support stand 21 is shifted to the left side, and is located far from the left foot switch 30L when the support stand 21 is shifted to the right side. Therefore, the left foot switch 30L has a small inclination angle when it is close to the operator U, and a large inclination angle when it is far from the operator U. Therefore, the operator's feeling when depressing the left foot switch 30L can be kept constant regardless of the position of the left foot switch 30L.

[0068] The operator U often works on either the right or left side of the support base 21. When the operator U works on the right side of the support base 21, the same effect can be obtained by switching the left-right relationship of each member compared to when the operator U works on the left side of the support base 21.

[0069] In addition, in the bed apparatus 20, the switch mounting member 34 lowers the foot switch 30 when an excessive load is applied to the foot switch 30. Fig. 7 is a diagram illustrating a state in which the switch mounting member 34 lowers the foot switch 30. The switch mounting member 34 mounts the foot switch 30 so that it can move up and down.

[0070] For example, assume that an excessive load F1 is applied to the foot switch 30 when the inclination angle of the switch mounting member 34 is a first angle θ1, as shown in the left diagram of Fig. 7. In this case, the switch mounting member 34 sets the inclination angle to a second angle θ2 smaller than the first angle θ1, as shown in the right diagram of Fig. 7, and lowers the foot switch 30. The switch mounting member 34 is an example of a height adjustment member.

[0071] For example, when the tabletop 23 descends, there is a possibility that the legs of the operator operating the foot switch 30 may become pinched between the tabletop 23 and the floor. In this regard, in the bed device 20 of the first embodiment, when an excessive load is applied to the foot switch 30, the foot switch 30 is lowered. When the foot switch 30 descends, the distance between the tabletop 23 and the operator's legs (feet) becomes longer, so that the operator's legs can be prevented from becoming pinched. Note that "feet" refers to, for example, the part of the human body below the ankle, and "legs" refers to, for example, the part between the "foot" and the "knee."

[0072] The state in which an excessive load is applied to the foot switch 30 may be detected in any manner. For example, the excessive load may be detected by detecting the load applied to the foot switch 30 using a load sensor or the like, or the state in which an excessive load is applied to the foot switch 30 may be detected when the tabletop 23 is lowered.

[0073] Second embodiment Next, a second embodiment will be described. The second embodiment differs from the first embodiment mainly in the form of the foot switch 30, and other parts are common to the first embodiment. Below, the second embodiment will be described focusing on the differences from the first embodiment, and the description of the parts common to the first embodiment may be omitted.

[0074] 8 is a diagram illustrating the relationship between the position of the tabletop 23 and the reaction position of the foot switch 30 in the second embodiment. The foot switch 30 in the second embodiment is directly attached to the support plate of the support bracket 33, so the switch mounting member 34 in the first embodiment is not provided. However, the switch mounting member 34 as in the first embodiment may be provided.

[0075] The control device 18 adjusts the reaction position of the foot switch 30 in the foot switch device 26 based on the left-right positions of the support base 21 and the tabletop 23. The reaction position is the position where the detection unit 30D detects the operator 30A and reacts to the operator 30A. The reaction position is adjusted by adjusting the position of the detection unit 30D. The foot switch 30 includes, for example, a detection position adjustment structure (not shown) that adjusts the position of the detection unit 30D. The detection position adjustment structure adjusts the reaction position by adjusting the detection unit 30D under the control of the control device 18.

[0076] When the left foot switch device 26L is disposed at the farthest position from the reference position BP, the control device 18 controls the position of the detection unit 30D of the left foot switch 30L so that the reaction position of the left foot switch 30L is the shallowest. In a similar case, the control device 18 controls the position of the detection unit 30D of the right foot switch 30R so that the reaction position of the right foot switch 30R is the deepest.

[0077] When the left foot switch device 26L and the right foot switch device 26R are positioned at equal distances from the reference position BP, the control device 18 controls the positions of the detection parts 30D of the left foot switch 30L and the right foot switch 30R so that the reaction positions of the left foot switch 30L and the right foot switch 30R are both medium.

[0078] When the left foot switch device 26L is located at a position closest to the reference position BP, the control device 18 controls the position of the detection unit 30D of the left foot switch 30L so that the reaction position of the left foot switch 30L is the deepest. In a similar case, the control device 18 controls the position of the detection unit 30D of the right foot switch 30R so that the reaction position of the right foot switch 30R is the shallowest.

[0079] When working on the left side of the support stand 21, the left foot switch 30L has a shallow response position when it is close to the operator U, and a deep response position when it is far from the operator U. Therefore, the operator's feeling when depressing the left foot switch 30L can be kept constant regardless of the position of the left foot switch 30L.

[0080] When the operator U works on the right side of the support platform 21, the same effects can be obtained by switching the left-right relationship of each member compared to when the operator U works on the left side of the support platform 21. Also, the bed apparatus of the second embodiment can obtain the same effects as the bed apparatus 20 of the first embodiment.

[0081] In the second embodiment, the foot switch 30 is arranged so that the bottom surface of the switch base 30C is aligned with the floor surface, but the foot switch 30 may be arranged so that the bottom surface of the switch base 30C is aligned with a vertical surface. Fig. 9 is a diagram showing an example of the foot switch 30 installed in a different orientation.

[0082] As shown in the left diagram of Fig. 9, the foot switch 30 of the second embodiment is disposed such that the bottom surface of the switch base 30C is fixed to the support plate 33B of the support bracket 33 and the bottom surface of the switch base 30C is along a horizontal plane. In contrast, as shown in the right diagram of Fig. 9, for example, the foot switch 30 may be disposed such that the bottom surface of the switch base 30C is fixed to the mounting plate 33A of the support bracket 33 and the bottom surface of the switch base 30C is along a vertical plane (hereinafter, referred to as an upward-facing arrangement).

[0083] The operator 30A of the foot switch 30 that is disposed facing upward is disposed so as to face outward from the reference position BP. The pivot shaft 30B is provided on the upper end of the operator 30A and the switch base 30C. The pivot shaft 30B may be provided on the lower end of the operator 30A and the switch base 30C.

[0084] (Third embodiment) Next, a third embodiment will be described. The third embodiment differs from the first embodiment mainly in the form of the foot switch 30, and other parts are common to the first embodiment. The foot switch 30 of the third embodiment does not include the operation element 30A, the swing shaft 30B, the switch base 30C, and the detection unit 30D in the first embodiment shown in FIG. 5, but is sheet-shaped and is provided on a support plate 33B of a support bracket 33.

[0085] 10 is a diagram illustrating the relationship between the position of the top board 23 and the foot switch 30 in the third embodiment. The foot switch 30 in the third embodiment includes a contact detection unit 30S that receives an operation by an operator U when the foot of the operator U, for example, the sole of the operator's foot (including the sole of the shoe worn by the operator) comes into contact with the contact.

[0086] The area of ​​the contact detection unit 30S is adjustable. A part of the surface becomes the contact detection unit 30S and the remaining part becomes the non-contact detection unit 30T, but the entire surface may become either the contact detection unit 30S or the non-contact detection unit 30T. The control device 18 adjusts the area of ​​the contact detection unit of the foot switch 30 based on the left-right positions of the support base 21 and the top board 23.

[0087] When the left foot switch 30L is located at the farthest position from the reference position BP, the control device 18 adjusts the area of ​​the contact detection section 30S of the left foot switch 30L to be the smallest. In a similar case, the control device 18 adjusts the area of ​​the contact detection section 30S of the right foot switch 30R to be the largest. In this case, the entire surface of the right foot switch 30R becomes the contact detection section 30S.

[0088] When the left foot switch 30L and the right foot switch 30R are positioned at equal distances from the reference position BP, the control device 18 adjusts the area of ​​the contact detection portion 30S so that the areas of the contact detection portions of the left foot switch 30L and the right foot switch 30R are both medium.

[0089] When the left foot switch device 26L is located closest to the reference position BP, the control device 18 adjusts the area of ​​the contact detection section 30S of the left foot switch 30L to be the largest. In a similar case, the control device 18 adjusts the area of ​​the contact detection section 30S of the right foot switch 30R to be the smallest. In this case, the entire surface of the left foot switch 30L becomes the contact detection section 30S.

[0090] When working on the left side of the support stand 21, the area of ​​the contact detection portion 30S of the left foot switch 30L is small when it is close to the operator U, and the area of ​​the contact detection portion 30S is large when it is far from the operator U. Therefore, the operator's feeling when depressing the left foot switch 30L can be kept constant regardless of the position of the left foot switch 30L.

[0091] When the operator U works on the right side of the support platform 21, the same effects can be obtained by switching the left-right relationship of each member compared to when the operator U works on the left side of the support platform 21. Also, the bed apparatus of the third embodiment can obtain the same effects as the bed apparatus 20 of the first embodiment.

[0092] In the third embodiment, the foot switch 30 detects the contact of the foot of the operator U, but instead of the contact of the foot, the foot contact of the operator U may be detected when a load is applied by the foot. Also, the height position of the toes of the operator U may be detected, and when it is detected that the height position of the toes is at a height position where the foot switch 30 can be touched, the contact of the foot of the operator U may be detected.

[0093] (Fourth embodiment) Next, a fourth embodiment will be described. The fourth embodiment is different from the first embodiment mainly in that it includes a pop-out mechanism that pops out the foot switch device 26 in the left and right directions from the support base 21, but the other parts are the same as those of the first embodiment. The pop-out mechanisms are provided between the support base 21 and the left support bracket 33L and between the support base 21 and the right support bracket 33R, respectively.

[0094] 11 is a diagram for explaining the relationship between the position of the tabletop 23 and the foot switch device 26 that is popped out by the pop-out mechanism in the fourth embodiment. The amount of pop-out when the foot switch device 26 is popped out in the left-right direction of the support base 21 by the pop-out mechanism is set to three levels: "large", "medium", and "none". However, the pop-out mechanism may be configured to adjust the amount of pop-out in more stages.

[0095] When the left foot switch device 26L is disposed at the position farthest from the reference position BP, the control device 18 controls the projection mechanism so that the projection amount of the left foot switch device 26L in the left direction (the direction in which the top board 23 moves) from the support base 21 becomes "large" and the left foot switch device 26L projects leftward from the support base 21. In a similar case, the control device 18 controls the projection mechanism so that the projection amount of the right foot switch device 26R in the right direction from the support base 21 becomes "none" and the right foot switch device 26R does not project leftward from the support base 21.

[0096] When the left foot switch device 26L is positioned at an equal distance from the reference position BP to the right foot switch device 26R, the control device 18 controls the projection mechanism so that the projection amounts of the left foot switch device 26L and the right foot switch device 26R from the support base are both "medium" and they each project in the left and right directions from the support base 21.

[0097] When the left foot switch device 26L is located at a position closest to the reference position BP, the control device 18 controls the projection mechanism so that the amount of projection of the left foot switch device 26L from the support base 21 in the left direction becomes "none" and the left foot switch device 26L does not project from the support base 21. In a similar case, the control device 18 controls the projection mechanism so that the amount of projection of the right foot switch device 26R from the support base 21 in the right direction becomes "large" and the right foot switch device 26R projects from the support base 21 in the left direction.

[0098] When working on the left side of the support base 21, the left foot switch 30L protrudes far to the left from the support base 21 when the support base 21 is close to the operator U, and is retracted when the support base 21 is far from the operator U. Therefore, the operator can maintain a constant feeling when depressing the left foot switch 30L regardless of the position of the left foot switch 30L.

[0099] When the operator U works on the right side of the support platform 21, the same effects can be obtained by switching the left-right relationship of each member compared to when the operator U works on the left side of the support platform 21. Also, the bed apparatus of the second embodiment can obtain the same effects as the bed apparatus 20 of the first embodiment.

[0100] In the fourth embodiment, the foot switch 30 is disposed so that the bottom surface of the switch base 30C is along the floor surface. Alternatively, as in the second embodiment, the foot switch 30 may be disposed so that the bottom surface of the switch base 30C is along a vertical surface.

[0101] According to at least one of the embodiments described above, the bed has a long tabletop, a support base that supports the tabletop, a bed drive device that moves the tabletop in the vertical direction and the horizontal direction that intersects with the longitudinal direction of the tabletop, and a foot switch that accepts operator operations related to driving the tabletop drive device, and the foot switch is provided on the support base, thereby preventing the operator's feet from becoming pinched.

[0102] Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0103] 1...X-ray CT device 10... Mounting device 11...X-ray tube 12…Wedge 13…Collimator 14…High voltage X-ray device 15…X-ray detector 16…DAS 17...Rotating frame 18...Control device 20...Bedroom equipment 21...Support stand 21A…Base material 21B…Flexible cover 22...Bed drive unit 22A…Up-down drive device 22B…Left-right drive device 23…Tabletop 24…Support frame 25…Pedestal 25A…Notch 26...Foot switch device 26L…Left foot switch device 26R…Right foot switch device 30…Foot switch 30A…Operator 30B...Oscillating shaft 30C…Switch base 30D…Detection section 30E…Detected part 30L…Left foot switch 30R…Right foot switch 30S…Contact detection unit 30T…Non-contact detection section 31…First foot switch 32…Second foot switch 33…Support bracket 33A…Mounting plate 33B…Support plate 33L…Left support bracket 33R…Right support bracket 34...Switch mounting member 34L…Left switch mounting part 34R…Right switch mounting part 40...Console device 41…Memory 42…Display 43...Input interface 50...Processing circuit 51...Control function 52…Pre-processing function 53...Reconstruction processing function 54...Image processing function BP…Reference position P...Subject U…Operator

Claims

1. With a long top plate, A support base for supporting the top plate; a bed driving device that moves the tabletop in a vertical direction and a horizontal direction intersecting a longitudinal direction of the tabletop; a foot switch that receives an operation by an operator regarding the driving of the bed driving device, The foot switch is provided on the support base. A bed device for medical imaging diagnostic equipment.

2. The foot switch is provided on the long side of the tabletop. The bed device for a medical image diagnostic apparatus according to claim 1.

3. The top plate is movable at least one of left and right from a reference position, The foot switch includes an operation element attached to a pivot shaft disposed at an end portion close to the reference position, the side farther from the reference position being a detected portion, and a detection portion that detects the operation element, and the detection portion detects the detected portion to accept an operation by the operator. The bed device for a medical image diagnostic apparatus according to claim 2.

4. an angle adjustment member on which the foot switch is mounted in a state in which the inclination angle around an axis parallel to the swing axis can be adjusted; The inclination angle of the angle adjustment member is set based on the left-right position of the tabletop. The bed device for a medical image diagnostic apparatus according to claim 3.

5. The inclination angle of the angle adjustment member is increased as the position of the tabletop becomes farther from the reference position.

5. The bed device for a medical image diagnostic apparatus according to claim 4.

6. a height adjustment member on which the foot switch is mounted so as to be movable up and down; The height adjustment member lowers the foot switch when an excessive load is applied to the foot switch. The bed device for a medical image diagnostic apparatus according to claim 1.

7. A reaction position at which the detection unit reacts to the operation element is adjusted according to the left-right position of the tabletop. The bed device for a medical image diagnostic apparatus according to claim 3.

8. The reaction position is shallower as the position of the top plate is farther from the reference position. The bed device for a medical image diagnostic apparatus according to claim 7.

9. The top plate is movable at least one of left and right from a reference position, the foot switch includes a contact detection unit that receives an operation by the operator when the operator's foot comes into contact with the contact detection unit, The area of ​​the contact detection unit is adjusted according to the left and right position of the top plate. The bed device for a medical image diagnostic apparatus according to claim 2.

10. The area of ​​the contact detection unit is increased as the position of the top plate is farther from the reference position. The bed device for a medical image diagnostic apparatus according to claim 9.

11. The top plate is movable at least one of left and right from a reference position, a pop-out mechanism for popping out the foot switch to either the left or right side of the support base, The pop-out mechanism is popped out according to the left-right position of the top plate. The bed device for a medical image diagnostic apparatus according to claim 2.

12. The pop-out mechanism pops out the foot switch in a direction in which the top plate moves from the reference position. The bed device for a medical image diagnostic apparatus according to claim 11.

13. The support base is mounted on a base placed on a floor surface, The bed driving device includes a vertical direction driving device that moves the tabletop in the vertical direction relative to the support base; a left-right direction drive device provided on the base and configured to move the support base in the left-right direction, The bed device for a medical image diagnostic apparatus according to claim 1.

14. the foot switch is suspended from the support base via a support bracket fixed to the support base, The base is formed with a notch into which the support bracket enters. The bed device for a medical image diagnostic apparatus according to claim 13.

15. A medical image diagnostic apparatus comprising the bed apparatus according to any one of claims 1 to 14.

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