JP6780979B2 - Sleeper and medical diagnostic imaging - Google Patents

Description

Embodiments of the present invention relate to sleeper devices and medical diagnostic imaging devices.

The medical image diagnostic device is a device that images a subject on a top plate and acquires internal information of the subject as image data. Examples of the medical image diagnostic device include an MRI (Magnetic Resonance Imaging) image, an X-ray CT (Computed Tomography) device, a PET (Positron Emission Tomography) device, and an X-ray diagnostic device.

The MRI apparatus as a medical image diagnostic apparatus is an apparatus that images a subject on a top plate and acquires internal information of the subject as image data.

The MRI apparatus excites the nuclear spin of an imaging site placed in a static magnetic field with a high frequency signal of Larmor frequency, that is, an RF (Radio Frequency) signal. Then, the MRI apparatus receives the magnetic resonance signal generated from the imaging site in association with the excitation, that is, the MR (Magnetic Resonance) signal with the coil, and reconstructs it to generate image data.

Japanese Patent No. 4716850

An object to be solved by the present invention is to provide a sleeper device and a medical diagnostic imaging device capable of quickly retracting the top plate on which a subject is placed from the inside of the gantry.

The sleeper device according to the present embodiment includes a sleeper body on which the top plate is placed, a top plate having a traveling roller that rotates on the sleeper body, and a top plate provided on the sleeper body so as to come into contact with the top plate. A traveling guide provided on the top plate and brought into contact with the sleeper body to guide the top plate to travel on the sleeper body, and a traveling guide provided on the sleeper body are used as the sleeper body. It is provided with an operation unit for performing an operation of retracting the traveling guide provided on the top plate or an operation of retracting the traveling guide provided on the top plate to the top plate.

The schematic diagram which shows the whole structure of the MRI apparatus as a medical image diagnostic apparatus which concerns on this embodiment. The schematic diagram which shows the structural example of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment. The detailed view which shows the structural example of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment. The figure which shows the relationship between the magnet mount and the top plate in the retracted state of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment. FIG. 4 is a sectional view taken along line AA of an MRI apparatus as a medical image diagnostic apparatus according to the first embodiment shown in FIG. BB sectional view of the MRI apparatus as a medical image diagnostic apparatus according to the first embodiment shown in FIG. The figure which shows the relationship between the magnet mount and the top plate in the approach state of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment. FIG. 7 is a cross-sectional view taken along the line CC of the MRI apparatus as a medical image diagnostic apparatus according to the first embodiment shown in FIG. The figure which shows the state which can pull out the top plate provided with the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment from a magnet mount. The figure which shows the state which the top plate provided with the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment cannot be pulled out from a magnet mount. The detailed view which shows the structural example of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 1st Embodiment. FIG. 5 is a diagram showing a state in which the top plate provided in the MRI apparatus as a medical diagnostic imaging apparatus according to the first embodiment cannot be pulled out from the magnet mount. FIG. 3 is a detailed view showing a configuration example of a top plate 51 provided in a modified example of the MRI apparatus as a medical image diagnostic apparatus according to the first embodiment. FIG. 3 is a detailed view showing a configuration example of a top plate provided in a modified example of the MRI apparatus as a medical image diagnostic apparatus according to the first embodiment. The cross-sectional view which shows the relationship between the magnet mount and the top plate in the approach state of the top plate provided in the MRI apparatus as the medical image diagnostic apparatus which concerns on 2nd Embodiment. The figure which shows the state which the top plate provided with the MRI apparatus as the medical image diagnostic apparatus which concerns on 2nd Embodiment cannot be pulled out from a magnet mount. FIG. 5 is a diagram showing a state in which the top plate provided in the MRI apparatus as a medical image diagnostic apparatus according to the second embodiment cannot be pulled out from the magnet mount.

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

The medical image diagnostic device according to the present embodiment includes a gantry and a sleeper device capable of inserting and retracting the top plate into the gantry. Hereinafter, the case where the medical diagnostic imaging apparatus according to the present embodiment is an MRI apparatus including a gantry and a sleeper apparatus will be described as an example, but the present invention is not limited to this case. The medical image diagnostic device according to the present embodiment may be an X-ray CT device including a pedestal and a sleeper device, a PET device, or the like.

(First Embodiment)
FIG. 1 is a schematic view showing an overall configuration of an MRI apparatus as a medical image diagnostic apparatus according to the first embodiment.

The MRI apparatus 1 includes a magnet mount 100, a control cabinet 300, a console 400, and a sleeper apparatus 500. The magnet mount 100, the control cabinet 300, and the sleeper device 500 are generally provided in a soundproofed inspection room. The examination room is also called a photography room. The console 400 is provided in the control room. The control room is also called the operation room.

The magnet mount 100 includes a static magnetic field magnet 10, a gradient magnetic field coil 11, and a WB (Whole Body) coil 12. These members are housed in a cylindrical housing. The sleeper device 500 has a sleeper body 50 and a top plate 51.

The control cabinet 300 includes a gradient magnetic field power supply 31 (X-axis 31x, Y-axis 31y, Z-axis 31z), an RF transmitter 32, an RF receiver 33, and a sequence controller 34.

The console 400 includes a processing circuit 40, a storage circuit 41, a display 42, and an input circuit 43. The console 400 functions as a host computer.

The static magnetic field magnet 10 of the magnet mount 100 is roughly classified into a tunnel type in which the magnet has a cylindrical magnet structure and an open type (open type) in which a pair of magnets are arranged above and below the imaging space. Here, the case where the static magnetic field magnet 10 is a tunnel type will be described, but the case is not limited to that case.

The static magnetic field magnet 10 has a substantially cylindrical shape, and generates a static magnetic field in a bore in which a subject, for example, a patient, is conveyed. The bore is the space inside the cylinder of the magnet mount 100. The static magnetic field magnet 10 is composed of a housing for holding liquid helium, a refrigerator for cooling the liquid helium to an extremely low temperature, and a superconducting coil inside the housing. The static magnetic field magnet 10 may be composed of a normal conduction magnet or a permanent magnet. Hereinafter, a case where the static magnetic field magnet 10 has a superconducting coil will be described.

The static magnetic field magnet 10 has a built-in superconducting coil, and the superconducting coil is cooled to an extremely low temperature by liquid helium. The static magnetic field magnet 10 generates a static magnetic field by applying a current supplied from a static magnetic field power source to the superconducting coil in the excitation mode. After that, when the mode shifts to the permanent current mode, the static magnetic field power supply is disconnected. Once transitioned to the permanent current mode, the static magnetic field magnet 10 continues to generate a large static magnetic field for a long period of time, for example, one year or more.

The gradient magnetic field coil 11 has a substantially cylindrical shape like the static magnetic field magnet 10, and is installed inside the static magnetic field magnet 10. The gradient magnetic field coil 11 applies a gradient magnetic field to the patient by the electric power supplied from the gradient magnetic field power supply 31.

Here, since the eddy current generated by the generation of the gradient magnetic field hinders the imaging, for example, ASGC (Actively Shielded Gradient Coil) for the purpose of reducing the eddy current is used as the gradient magnetic field coil 11. May be good. The ASGC is a gradient magnetic field coil in which a shield coil for suppressing a leakage magnetic field is provided outside a main coil for forming each gradient magnetic field in the X-axis, Y-axis, and Z-axis directions.

The WB coil 12, also called a whole-body RF (Radio Frequency) coil, is installed inside the gradient magnetic field coil 11 in a substantially cylindrical shape so as to surround the patient. The WB coil 12 transmits the RF pulse transmitted from the RF transmitter 32 toward the patient. On the other hand, the WB coil 12 receives a magnetic resonance signal emitted from the patient by excitation of hydrogen nuclei, that is, an MR (Magnetic Resonance) signal.

In addition to the WB coil 12, the MRI apparatus 1 may include a local coil 20 as shown in FIG. The local coil 20 is also called a local RF coil. The local coil 20 is placed close to the patient's body surface. The local coil 20 may include a plurality of coil elements. Since these plurality of coil elements are arranged in an array inside the local coil 20, they are sometimes called a PAC (Phased Array Coil).

There are several types of local coil 20. For example, the local coil 20 includes a body coil (Body Coil) installed on the chest, abdomen, or leg of the patient as shown in FIG. 1 and a spine coil (Spine Coil) installed on the back side of the patient. There is a type. In addition, the local coil 20 also has a type such as a head coil (Head Coil) for imaging the patient's head and a foot coil (Foot Coil) for imaging the foot. The local coil 20 also includes a wrist coil (Wrist Coil) for imaging the wrist, a knee coil (Knee Coil) for imaging the knee, and a shoulder coil (Shoulder Coil) for imaging the shoulder. Many types of the local coil 20 are reception-only coils, but some local coils 20 are transmission / reception coils that perform both transmission and reception. For example, the transmission / reception coil also exists in the head coil and the knee coil as the local coil 20.

The gradient magnetic field power supply 31 includes gradient magnetic field power supplies 31x, 31y, and 31z for each channel that drive the coils that generate the X-axis, Y-axis, and Z-axis gradient magnetic fields. The gradient magnetic field power supplies 31x, 31y, and 31z output necessary current waveforms independently for each channel according to the command of the sequence controller 34. Thereby, the gradient magnetic field coil 11 can apply the gradient magnetic field in the X-axis, Y-axis, and Z-axis directions to the patient.

The RF transmitter 32 generates an RF pulse based on an instruction from the sequence controller 34. The generated RF pulse is transmitted to the WB coil 12 and applied to the patient. An MR signal is generated from the patient by applying an RF pulse. The local coil 20 or the WB coil 12 receives this MR signal.

The MR signal received by the local coil 20, more specifically, the MR signal received by each coil element in the local coil 20 is transmitted to the RF receiver 33. The output path of each coil element and the output path of the WB coil 12 are called channels. Therefore, each MR signal output from each coil element or the WB coil 12 may be referred to as a channel signal. The channel signal received by the WB coil 12 is also transmitted to the RF receiver 33.

The RF receiver 33 performs AD (Analog to Digital) conversion of the channel signal from the local coil 20 and the WB coil 12, that is, the MR signal, and outputs the channel signal to the sequence controller 34. The digitally converted MR signal is sometimes called raw data.

The sequence controller 34 captures the patient by driving the gradient magnetic field power supply 31, the RF transmitter 32, and the RF receiver 33, respectively, under the control of the console 400. Upon receiving the raw data from the RF receiver 33 by imaging, the sequence controller 34 transmits the raw data to the console 400.

The sequence controller 34 includes a processing circuit (not shown). This processing circuit is composed of, for example, a processor that executes a predetermined program and hardware such as an FPGA (Field Programmable Gate Array) and an ASIC (Application Specific Integrated Circuit).

The console 400 includes a processing circuit 40, a storage circuit 41, a display 42, and an input circuit 43.

The processing circuit 40 means a processing circuit such as a dedicated or general-purpose CPU (Central Processing Unit) or MPU (Micro Processor Unit), an integrated circuit for a specific application (ASIC), and a programmable logic device. Examples of the programmable logic device include circuits such as a simple programmable logic device (SPLD: Simple Programmable Logic Device), a complex programmable logic device (CPLD: Complex Programmable Logic Device), and a field programmable gate array (FPGA). The processing circuit 40 realizes a function described later by reading and executing a program stored in the storage circuit 41 or directly incorporated in the processing circuit 40.

Further, the processing circuit 40 may be composed of a single circuit or a combination of a plurality of independent circuits. In the latter case, the storage circuit 41 for storing the program may be individually provided in each circuit of the plurality of circuits, or one storage circuit 41 stores the program corresponding to the function of the plurality of circuits. There may be.

The storage circuit 41 includes semiconductor memory elements such as a RAM (Random Access Memory) and a flash memory (Flash Memory), a hard disk, an optical disk, and the like. The storage circuit 41 may include a portable medium such as a USB (Universal Serial bus) memory and a DVD (Digital Video Disk). The storage circuit 41 stores various processing programs (including an OS (Operating System) and the like in addition to the application program) used in the processing circuit 40, data necessary for executing the program, and medical images. Further, the OS may include a GUI (Graphical User Interface) that makes extensive use of graphics for displaying information on the display 42 to the operator and allows basic operations to be performed by the input circuit 43.

The display 42 is a display device such as a liquid crystal display panel, a plasma display panel, and an organic EL (Electro Luminescence) panel.

The input circuit 43 is a circuit for inputting a signal from an input device such as a pointing device (mouse or the like) or a keyboard that can be operated by an operator, and here, the input device itself is also included in the input circuit 43. .. When the input device is operated by the operator, the input circuit 43 generates an input signal corresponding to the operation and outputs the input signal to the processing circuit 40. The MRI apparatus 1 may include a touch panel in which the input device is integrally configured with the display 42.

The bed body 50 of the sleeper device 500 mounts the top plate 51 so that the top plate 51 can be moved in the vertical direction and the horizontal direction. The vertical movement of the top plate 51 is the movement of the top plate 51 in the thickness direction. The horizontal movement of the top plate 51 includes movement in the front-rear direction which is the longitudinal direction of the top plate 51, that is, traveling, and movement in the left-right direction which is the lateral direction of the top plate 51. Before imaging, the patient placed on the top plate 51 is moved up and down to a predetermined height. After that, the sleeper body 50 causes the top plate 51 to travel in the front-rear direction to move the patient inside the magnet stand 100. The vertical direction of the top plate 51 substantially coincides with the direction parallel to the Y axis, the front-rear direction of the top plate 51 substantially coincides with the direction parallel to the Z axis, and the horizontal direction of the top plate 51 is parallel to the X axis. It almost matches the direction.

FIG. 2 is a schematic view showing a configuration example of a top plate 51 provided in the MRI apparatus 1. The left portion of FIG. 2 is a view of the top plate 51 viewed from the front side. The upper right portion of FIG. 2 is a view of the top plate 51 viewed from the side surface side. The lower right portion of FIG. 2 is a view of the top plate 51 viewed from the upper surface side.

As shown in FIG. 2, the top plate 51 includes a traveling roller 51a, a traveling guide 51b, and an operation unit 51c. The top plate 51 has a traveling roller 51a that rotates on the sleeper body 50. The traveling roller 51a is provided so as to project on the lower surface side of the top plate 51, and can rotate bidirectionally about the left-right direction of the top plate 51. The traveling guide 51b is provided on the top plate 51 and comes into contact with the sleeper body 50 to guide the top plate 51 to travel on the sleeper body 50. That is, the traveling guide 51b guides the traveling of the top plate 51 and is provided so as to project on the left and right surface sides of the top plate 51. Examples of the traveling guide 51b include a guide roller that can rotate in both directions about the vertical direction of the top plate 51, a sliding member that does not rotate, and the like. Hereinafter, a case where the traveling guide 51b is a guide roller will be described.

The operation unit 51c performs an operation of retracting the guide roller 51b provided on the top plate 51 to the top plate 51. That is, the operation unit 51c performs an operation of separating the guide roller 51b provided on the top plate 51 from the trajectory in the left-right direction of the top plate 51. Here, the trajectory of the guide roller 51b refers to a path drawn by the guide roller 51b of the top plate 51 when the top plate 51 travels in a direction parallel to the Z axis. Examples of the operation unit 51c include a lever and a handle that can rotate around the axis. Hereinafter, a case where the operation unit 51c is a lever (hereinafter, referred to as “evacuation lever”) will be described.

FIG. 3 is a detailed view showing a configuration example of the top plate 51 provided in the MRI apparatus 1. The upper part of FIG. 3 is a view of the top plate 51 viewed from the lower surface side. The lower part of FIG. 3 is a view of the top plate 51 as viewed from the side surface side.

As shown in FIG. 3, the top plate 51 includes a traveling roller 51a, a guide roller 51b, and a retracting lever 51c, as well as a guide roller frame 51d, a locking material 51e, an elastic material 51f, a frame supporting material 51g, and a wire 51h. ..

The guide roller frame 51d supports a shaft that is a rotation axis of the guide roller 51b. The guide roller frame 51d includes two opposing frames in the left-right direction of the top plate 51. Both ends of each facing frame are detachably connected to the lock material 51e. The guide roller frame 51d is fixed by the frame support member 51g.

The elastic material 51f is connected between the two opposing frames constituting the guide roller frame 51d in a state where the top plate 51 is stored in the left-right direction as the extension direction. Examples of the elastic material 51f include springs and rubber. Hereinafter, a case where the elastic material 51f is a spring will be described. The guide roller 51b is stored and held by the spring 51f via the guide roller frame 51d. The spring 51f is not limited to the two shown in the figure.

The wire 51h connects the retract lever 51c and the lock material 51e.

Returning to the description of FIG. 1, the top plate 51 travels in a direction parallel to the Z axis. The relationship between the magnet stand 100 and the top plate 51 in the retracted state of the top plate 51 is shown in FIGS. 4 to 6, and the relationship between the magnet stand 100 and the top plate 51 in the approached state of the top plate 51 is shown in FIGS. 7 and 8. Will be explained respectively.

FIG. 4 is a diagram showing the relationship between the magnet mount 100 and the top plate 51 in the retracted state of the top plate 51 provided in the MRI apparatus 1. FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a cross-sectional view taken along the line BB of FIG.

As shown in FIGS. 4 and 5, the bed body 50 includes a traveling rail 50a and a guide surface 50b. The top plate 51 includes a traveling roller 51a and a guide roller 51b. The traveling rail 50a extends below the top plate 51 in a direction parallel to the Z axis in order to support the traveling roller 51a of the top plate 51. The guide surface 50b extends in a direction parallel to the Z axis on the side of the top plate 51 in order to support the guide roller 51b of the top plate 51. The guide surface 50b is designed so as to have a gap between the guide surface 50b and the guide roller 51b of the top plate 51.

As shown in FIGS. 4 and 6, the magnet mount 100 includes a traveling rail 10a and a guide surface 10b. The traveling rail 10a extends below the top plate 51 in a direction parallel to the Z axis in order to support the traveling roller 51a shown in FIG. The traveling rail 10a is provided on an extension of the traveling rail 50a (shown in FIG. 5). The guide surface 10b is extended on the side of the top plate 51 in a direction parallel to the Z axis in order to support the guide roller 51b. The guide surface 10b is designed to have a gap between it and the guide roller 51b, and is provided on an extension of the guide surface 50b (shown in FIG. 5).

The top plate 51 runs from the position of the top plate 51 shown in FIG. 4 toward the sleeper main body 50. While the top plate 51 is traveling, the traveling rollers 51a of the top plate 51 rotate due to friction with the traveling rails 10a and 50a, respectively. On the other hand, when the guide roller 51b comes into contact with the guide surfaces 10b and 50b while the top plate 51 is traveling, the guide roller 51b rotates due to friction with the guide surfaces 10b and 50b. Then, as shown in FIGS. 7 and 8, a part of the top plate 51 is stationary inside the magnet mount 100.

FIG. 7 is a diagram showing the relationship between the magnet stand 100 and the top plate 51 in the approached state of the top plate 51 provided in the MRI apparatus 1. FIG. 8 is a cross-sectional view taken along the line CC of FIG.

Here, the top plate 51 may not be able to be pulled out from the magnet mount 100 due to a deviation at the connection point of the top plate 51 to the magnet mount 100, play due to an earthquake, or the like.

FIG. 9 is a diagram showing a state in which the top plate 51 provided in the MRI apparatus 1 can be pulled out from the magnet mount 100. FIG. 10 is a diagram showing a state in which the top plate 51 provided in the MRI apparatus 1 cannot be pulled out from the magnet mount 100.

In FIG. 9, the front-rear direction of the top plate 51 is substantially parallel to the traveling direction of the top plate 51, that is, the direction parallel to the Z axis. In this case, the top plate 51 can travel in the direction parallel to the Z axis and can be pulled out from the magnet stand 100.

On the other hand, in FIG. 10, the front-rear direction of the top plate 51 causes an angular shift with respect to the direction parallel to the Z axis, and the two diagonal guide rollers 51b (thick broken lines in FIG. 10) are the guide surfaces 10b, respectively. It is pressed against 50b and the top plate 51 is locked. In this case, the top plate 51 cannot travel in the direction parallel to the Z axis and cannot be pulled out from the magnet stand 100.

Therefore, the MRI apparatus 1 has a configuration in which the guide roller 51b is released from the state of being pressed against the guide surfaces 10b and 50b according to the operation of the operator.

FIG. 11 is a detailed view showing a configuration example of the top plate 51 provided in the MRI apparatus 1. The upper part of FIG. 11 is a view of the top plate 51 viewed from the lower surface side. The lower part of FIG. 11 is a view of the top plate 51 viewed from the side surface side. FIG. 11 shows a state after the rotation operation of the retract lever 51c in FIG.

As shown in FIG. 11, the wire 51h and the lock member 51e are pulled toward the retracting lever 51c according to the rotation operation of the retracting lever 51c. When the lock member 51e is pulled toward the retract lever 51c and disengages from the two opposing frames constituting the guide roller frame 51d, the two opposing frames are attracted to each other by releasing the stored energy of the spring 51f. That is, the guide roller 51b is retracted inside the top plate 51 by releasing the stored energy of the spring 51f according to the rotation operation of the retracting lever 51c. That is, the guide roller 51b is housed inside the top plate 51.

FIG. 12 is a diagram showing a state in which the top plate 51 provided in the MRI apparatus 1 cannot be pulled out from the magnet mount 100. That is, FIG. 12 is a state in which the non-pullable state shown in FIG. 10 is removed. FIG. 12 shows the state of the retract lever 51c after the rotation operation in FIG.

As shown in FIG. 12, when the guide roller 51b is retracted inside the top plate 51 by the rotation operation of the retract lever 51c, the guide roller 51b is released from the state of being pressed against the guide surface 10b of the magnet mount 100. Similarly, the guide roller 51b is released from the state of being pressed against the guide surface 50b of the sleeper body 50. Therefore, after the rotation operation of the retract lever 51c, the operator can easily pull out the top plate 51 from the inside of the magnet stand 100.

The motor in the drive mechanism that retracts the guide roller 51b inside the top plate 51 and causes the top plate 51 to travel in the direction parallel to the Z axis by releasing the stored energy of the spring 51f according to the rotation operation of the retract lever 51c. And the drive roller may be disconnected from each other. There is an advantage in the configuration that completes the function of retracting the guide roller 51b on the sleeper device 500 side in that the retracting function of the top plate 51 can be realized only by operating the retracting lever 51c, that is, by one action. Further, the technical idea of the sleeper device 500 in the MRI device 1 can be applied to a dockable sleeper in which the magnet stand 100 and the sleeper device 500 can be attached and detached, which also has a function as a stretcher.

According to the MRI apparatus 1, the guide roller 51b provided on the top plate 51 on which the patient is placed is detached from the orbit in the left-right direction of the top plate 51 and retracted inside the top plate 51, thereby retracting the top plate 51. Can be quickly retracted from the inside of the magnet stand 100.

(Modification example)
In the MRI apparatus 1 according to the first embodiment described above, in order to retract the guide roller 51b provided on the top plate 51 into the inside of the top plate 51, the guide roller 51b is removed from the track in the left-right direction of the top plate 51. It is something to separate. In a modified example of the MRI apparatus 1 according to the first embodiment, in order to retract the guide roller 51b provided on the top plate 51 into the inside of the top plate 51, the guide roller 51b is moved vertically from the track of the top plate 51. It has a mechanism for desorption.

The schematic diagram showing the overall configuration of the modified example of the MRI apparatus 1 is the same as that shown in FIG. 1, and thus the description thereof will be omitted. The schematic diagram showing the configuration example of the top plate 51 provided in the modified example of the MRI apparatus 1 is the same as that shown in FIG. 2, and thus the description thereof will be omitted.

FIG. 13 is a detailed view showing a configuration example of the top plate 51 provided in the modified example of the MRI apparatus 1. The upper part of FIG. 13 is a view of the top plate 51 viewed from the lower surface side. The lower part of FIG. 13 is a view of the top plate 51 viewed from the side surface side.

As shown in FIG. 13, the top plate 51 includes a traveling roller 51a, a guide roller 51b (not shown), a retracting lever 51c, a traveling roller support plate 51m, a lock material 51n, a lock material support plate 51o, an elastic material 51p, and a wire. It has 51q. In FIG. 13, the same members as those shown in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.

The traveling roller support plate 51m supports the shaft of the traveling roller 51a.

The lock material 51n is sandwiched between the traveling roller support plate 51m and the lock material support plate 51o.

The elastic material 51p is connected between the traveling roller support plate 51m and the lock material support plate 51o in a state where the elastic material 51p is stored with the vertical direction of the top plate 51 as the compression direction. Examples of the elastic material 51p include springs and rubber. Hereinafter, a case where the elastic material 51p is a spring will be described. The set of the spring 51p, the lock material 51n, and the lock material support plate 51o is not limited to the one set shown in the figure. The traveling roller 51a supported by the traveling roller support plate 51m is stored and held by the spring 51p.

The wire 51q connects the retract lever 51c and the lock material 51n.

Here, when the top plate 51 cannot be pulled out from the magnet stand 100 as described with reference to FIG. 10 due to a deviation at the connection point of the top plate 51 to the magnet stand 100, backlash due to an earthquake, or the like. There is.

Therefore, in the modified example of the MRI apparatus 1, the contact of the guide roller 51b with the guide surfaces 10b and 50b is released according to the operation of the operator.

FIG. 14 is a detailed view showing a configuration example of the top plate 51 provided in the modified example of the MRI apparatus 1. The upper part of FIG. 14 is a view of the top plate 51 viewed from the lower surface side. The lower part of FIG. 14 is a view of the top plate 51 viewed from the side surface side. FIG. 14 shows the state of the retract lever 51c after the rotation operation in FIG.

As shown in FIG. 14, the wire 51q and the lock member 51n are pulled toward the retract lever 51c according to the rotation operation of the retract lever 51c. When the lock material 51n is pulled toward the retract lever 51c and disengages from the lock material support plate 51o, the lock material support plate 51o is attracted upward by releasing the stored energy of the spring 51p. Then, the entire top plate 51 jumps upward on the top plate 51. That is, the guide roller 51b (shown in FIG. 2) moves in the vertical direction of the top plate 51 by releasing the stored energy of the spring 51p according to the rotation operation of the retract lever 51c, and the guide surfaces 10b (shown in FIG. Detach from (shown in).

The motor in the drive mechanism that retracts the guide roller 51b inside the top plate 51 and causes the top plate 51 to travel in the direction parallel to the Z axis by releasing the stored energy of the spring 51p according to the rotation operation of the retract lever 51c. And the drive roller may be disconnected from each other. There is an advantage in the configuration that is completed on the sleeper device 500 side in that the evacuation function of the top plate 51 can be realized only by operating the evacuation lever 51c, that is, one action. Further, the technical idea of the sleeper device 500 in the modified example of the MRI device 1 can be applied to a dockable sleeper that also has a function as a stretcher.

According to a modification of the MRI apparatus 1, the guide roller 51b provided on the top plate 51 on which the patient is placed is detached from the trajectory in the vertical direction of the top plate 51 and retracted inside the top plate 51. The top plate 51 can be quickly retracted from the inside of the magnet stand 100.

(Second Embodiment)
The MRI apparatus 1 and its modified example according to the first embodiment described above are for retracting the guide roller provided on the top plate 51 into the inside of the top plate 51. The MRI apparatus 1A according to the second embodiment retracts the guide roller provided on the magnet mount 100 into the inside of the magnet mount 100.

The schematic diagram showing the overall configuration of the MRI apparatus 1A as the medical image diagnostic apparatus according to the second embodiment is the same as that shown in FIG. 1, and thus the description thereof will be omitted.

FIG. 15 is a cross-sectional view showing the relationship between the magnet mount 100 and the top plate 51 in the approached state of the top plate 51 provided in the MRI apparatus 1A.

As shown in FIG. 15, the magnet mount 100 includes a traveling rail 10a, a guide roller 10s, and a retracting lever 10t (shown in FIGS. 16 and 17). The traveling rail 10a extends below the top plate 51 in a direction parallel to the Z axis in order to support the traveling roller 51a of the top plate 51. The top plate 51 includes a traveling roller 51a and a guide surface 51s. The guide surface 51s extends in a direction parallel to the Z axis in order to support the guide roller 10s of the magnet mount 100. The guide surface 51s is designed so as to have a gap between the guide surface 51s and the guide roller 10s of the magnet mount 100.

Here, when the top plate 51 cannot be pulled out from the magnet stand 100 as described with reference to FIG. 10 due to a deviation at the connection point of the top plate 51 to the magnet stand 100, backlash due to an earthquake, or the like. There is.

Therefore, in the MRI apparatus 1A, the contact of the guide roller 10s with the guide surface 51s is released according to the operation of the operator.

FIG. 16 is a diagram showing a state in which the top plate 51 provided in the MRI apparatus 1A cannot be pulled out from the magnet mount 100. FIG. 17 is a diagram showing a state in which the top plate 51 provided in the MRI apparatus 1A cannot be pulled out from the magnet mount 100. That is, FIG. 17 is a state in which the non-pullable state shown in FIG. 16 is removed. FIG. 17 shows a state in FIG. 16 after the rotation operation of the retract lever 10t of the magnet mount 100.

As shown in FIGS. 16 and 17, the bed body 50 includes a traveling guide 50s. The traveling guide 50s is provided on the sleeper body 50 and is brought into contact with the top plate 51 to guide the top plate 51 to travel on the sleeper body 50. That is, the traveling guide 50s is provided so as to guide the traveling of the top plate 51 and project toward the inner surface side of the sleeper main body 50. Examples of the traveling guide 50s include a guide roller that can rotate in both directions about the vertical direction of the top plate 51, a sliding member that does not rotate, and the like. Hereinafter, a case where the traveling guide 50s is a guide roller will be described.

In FIG. 16, as described with reference to FIG. 10, the front-rear direction of the top plate 51 causes an angular deviation with respect to the direction parallel to the Z axis, and the two guide rollers 10s and 50s (thick broken line in FIG. 16). ) Are pressed against the guide surface 51s, respectively, and the top plate 51 is locked. In this case, the top plate 51 cannot travel in the direction parallel to the Z axis and cannot be pulled out from the magnet mount 100.

As shown in FIG. 17, when the guide roller 10s is detached in the direction of the rotation axis by the rotation operation of the retract lever 10t and retracted inside the magnet mount 100, the guide roller 10s reaches the guide surface 51s of the top plate 51. Contact is released. For example, as shown in FIG. 17, the contact of the guide roller 10s shown by the thick broken line in FIG. 16 with the guide surface 51s is released. The evacuation mechanism of the guide roller 10s to the inside may be the same as the evacuation mechanism of the guide roller 51b described above. Therefore, after the rotation operation of the retract lever 10t, the operator can easily pull out the top plate 51 from the inside of the magnet stand 100. The guide roller 50s provided on the sleeper body 50 and brought into contact with the top plate 51 to guide the top plate 51 to travel on the sleeper body 50 is configured to be detached in the direction of its rotation axis. You may. With such a configuration, the guide roller 50s provided on the sleeper body 50 is retracted inside the sleeper body 50.

According to the MRI apparatus 1A, the top plate 51 can be quickly retracted from the inside of the magnet mount 100 by retracting the guide roller 10s provided on the magnet mount 100 into the magnet mount 100.

According to the bed device and the medical diagnostic imaging device of at least one embodiment described above, the top plate on which the subject is placed can be quickly retracted from the inside of the pedestal.

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

1,1A ... Magnetic resonance imaging (MRI) device 50 ... Sleeper body 51 ... Top plate 51a ... Traveling rollers 51b, 10s ... Traveling guides 51c, 10t ... Operation unit 100 ... Magnet mount 500 ... Sleeping device

Claims (9)

The sleeper body on which the top plate is placed and
A traveling guide that guides the top plate to travel on the sleeper body in a state of being provided on the sleeper body and in contact with the top plate, or in a state of being provided on the top plate and in contact with the sleeper body. When,
An operation unit that performs an operation of retracting the traveling guide provided on the sleeper body to the sleeper body or an operation of retracting the traveling guide provided on the top plate to the top plate.
Sleeper device equipped with. The sleeper body on which the top plate is placed and
A top plate having a traveling roller that rotates on the sleeper body,
A traveling guide that guides the top plate to travel on the sleeper body by being provided on the sleeper body and contacting the top plate, or by being provided on the top plate and contacting the sleeper body. ,
An operation unit that performs an operation of retracting the traveling guide provided on the sleeper body to the sleeper body or an operation of retracting the traveling guide provided on the top plate to the top plate.
Sleeper device equipped with. The operation unit is provided on the sleeper body.
The sleeper device according to claim 1 or 2, wherein the traveling guide provided on the top plate is a guide roller or a sliding member that can come into contact with the guide surface of the sleeper body. The sleeper device according to claim 1 or 2, wherein the traveling guide provided on the sleeper body is a guide roller or a sliding member that can come into contact with the guide surface of the top plate. The traveling guide is stored and held by an elastic material, and is held.
The sleeper device according to any one of claims 1 to 4, wherein the traveling guide is retracted by releasing the accumulated energy of the elastic material according to the operation of the operation unit. The traveling guide provided on the top plate is held by the elastic material in the left-right direction of the top plate.
The sleeper device according to claim 5, wherein the traveling guide is retracted inside the top plate by releasing the stored energy of the elastic material according to the operation of the operation unit. The traveling guide provided on the top plate is held by the elastic material in the vertical direction of the top plate.
The sleeper device according to claim 5, wherein the traveling guide is retracted inside the top plate by releasing the stored energy of the elastic material according to the operation of the operation unit. By releasing the stored energy of the elastic material according to the operation of the operation unit, the traveling guide provided on the top plate is retracted, and the connection between the motor and the drive roller in the drive mechanism for traveling the top plate is released. The sleeper device according to claim 6 or 7. A medical image diagnostic device equipped with a sleeper device equipped with a top plate and a pedestal.
The sleeper device
The sleeper body on which the top plate is placed and
A top plate having a traveling roller that rotates on the sleeper body,
A traveling guide that guides the top plate to travel on the sleeper body by being provided on the sleeper body and contacting the top plate, or by being provided on the top plate and contacting the sleeper body. ,
An operation unit that performs an operation of retracting the traveling guide provided on the sleeper body to the sleeper body or an operation of retracting the traveling guide provided on the top plate to the top plate.
With
The gantry
A traveling rail that supports the traveling roller of the top plate,
Medical diagnostic imaging equipment equipped with.

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