JP5677906B2 - Magnetic resonance imaging apparatus and bed apparatus - Google Patents

Description

  The present invention relates to a couch device used in a magnetic resonance imaging apparatus, and more particularly to a couch device that moves a top plate up and down.

  Usually, in a magnetic resonance imaging apparatus, an operator places a subject on a bed and transports the subject into a bore (into the internal space) of the magnetic resonance imaging apparatus to take an image. Then, the operator carries out the work of taking the subject out of the bore and taking it down from the bed after photographing. Patent Document 1 discloses a method of automatically setting a bed height suitable for a subject from prior information in order to shorten the examination time per subject. Patent Document 2 discloses a bed that uses a tape switch to avoid interference with a stretcher.

JP2009-291128A JP2007-130111A

  However, although the bed shown in Patent Literature 1 and Patent Literature 2 is designed in consideration of shortening of examination time and safety, it has not been considered to assist or support a subject.

  The present invention provides a bed that assists or supports a subject as well as shortening examination time and safety.

  A bed apparatus according to a first aspect is arranged on a top board on which a subject is placed, a top board driving unit that moves the top board in the vertical direction, and an end of the top board, and the top board by the top board driving unit. A movement permission switch for determining permission or non-permission of movement of the plate in the vertical direction. Further, the bed apparatus is disposed near the movement permission switch and below the top board, and is disposed near the movement permission switch and above the top board, and the first sensor that detects pressing. And a second sensor for detecting. When the movement permission switch is in the permitted state and the first sensor detects the pressing, the bed apparatus outputs a signal for raising the table top to the table driving unit, and the movement permission switch is in the permitted state and the second sensor is pressed. And a control unit that outputs a signal for lowering the top plate to the top plate driving unit.

  The bed apparatus according to the second aspect is the bed apparatus according to the first aspect. In the bed apparatus according to the first aspect, when the first sensor or the second sensor detects pressing, the control unit moves the top plate in the vertical direction at the first speed. A signal to be moved is output to the top board driving unit. Then, when the first sensor or the second sensor continuously detects the pressure longer than the threshold time, the control unit outputs a signal for moving the top and bottom in a vertical direction at a second speed faster than the first speed. Output to the top plate drive.

  A bed apparatus according to a third aspect is the bed apparatus according to the first aspect and the second aspect, and includes a knee height sensor that detects the height of the subject's knee, and the control unit sets the height of the top plate to the knee height. A signal for moving to the knee height detected by the height sensor is output to the top board driving unit.

  The bed apparatus according to the fourth aspect is the bed apparatus according to the third aspect, wherein the control unit raises the top plate moved to the knee height until the second sensor detects the buttocks of the subject, After detecting the buttocks, a signal for lowering the top board to the knee height is output to the top board driving unit.

  The bed apparatus according to the fifth aspect is the bed apparatus according to the fourth aspect, wherein the control unit sends a signal for raising the top plate moved to the knee height to a position where the second sensor detects the buttocks of the subject. Output to the plate drive.

  A bed apparatus according to a sixth aspect is the bed apparatus according to any one of the first to third aspects, further comprising a carriage sensor that detects a carriage on which the subject is placed, and the control unit is configured to detect the carriage. Then, a signal for moving the top plate to a height suitable for the carriage is output to the top plate drive unit.

  A bed apparatus according to a seventh aspect is the bed apparatus according to any one of the first to third aspects, wherein the control unit has a top plate based on the physical information of the subject provided by the hospital information system. A signal for moving to a height suitable for the subject is output to the top board drive unit.

  A bed apparatus according to an eighth aspect of the bed apparatus according to any one of the first to sixth aspects includes a longitudinal direction moving unit that moves the top plate in the longitudinal direction.

The medical image diagnostic apparatus according to the ninth aspect is capable of photographing the subject placed on the top plate using the bed apparatus according to the eighth aspect within the bore of the gantry by means of longitudinal movement means. Move to the correct position.
The medical image diagnostic apparatus according to the tenth aspect collects data reflecting the internal form of the subject and reconstructs an image representing the internal form of the subject. The medical image diagnostic apparatus includes the bed apparatus according to any one of the first to eighth aspects.

  The present invention provides a bed that supports the operation of a subject. The present invention provides a magnetic resonance imaging apparatus in which a series of examination times is shortened and safety is improved.

2 is a perspective view of a configuration of a magnetic resonance imaging apparatus 400. FIG. (A) is a top view of the bed 200. (B) is sectional drawing of AA of (a). It is a flowchart of the 2nd inspection procedure. FIG. 4 is a flowchart of the fourth inspection procedure. It is a flowchart of the 2nd inspection procedure by a modification. It is a flowchart which concerns on the 1st test | inspection procedure for those who can walk alone (single walk). It is the figure which showed the entrance vicinity of the imaging | photography room. (A) is a figure of the height of the top plate 290 stopped at the height of the knee. (B) is the figure which showed the state which the test subject's buttocks touched the 2nd sensor 220. FIG. (C) is the figure which showed the state in which the subject sat on the top plate 290 of the height of a knee. It is a flowchart which concerns on the 5th test | inspection procedure for walking alone. (A) is the figure which showed the state to which the subject sat on the top plate 290 of the height of a knee. (B) is the figure which showed the state which the subject's waist lifts by the raise of the top plate 290. FIG. (C) is the figure which showed the state which the top plate 290 stopped in the test subject's buttocks vicinity. 3 is a perspective view of a stretcher 700. FIG. 5 is a flowchart according to a first inspection procedure for the stretcher 700. 12 is a flowchart according to a fifth inspection procedure for the stretcher 700. 1 is a perspective view of a wheelchair 800. FIG. It is a flowchart which concerns on the 1st test | inspection procedure for the wheelchair 800. It is a flowchart which concerns on the 5th test | inspection procedure for the wheelchair 800.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The scope of the present invention is not limited to these forms. For example, in the following embodiment, the bed 200 of the magnetic resonance imaging apparatus 400 will be described. However, X-ray CT that collects data reflecting the internal form of the subject and reconstructs an image representing the internal form of the subject. The present invention can also be applied to a device equipped with a bed such as a device or a nuclear medicine device.

<Configuration of magnetic resonance imaging apparatus>
FIG. 1 is a perspective view of the configuration of the magnetic resonance imaging apparatus 400. The magnetic resonance imaging apparatus 400 includes a magnet system 100, a bed 200, and a console 300.

  The operator lays the subject SB (see FIG. 2) on the top plate 290 of the bed 200, and the magnetic resonance imaging apparatus 400 moves the top plate 290 to the inside of the bore 110 of the magnet system 100 by a driving device described later. Shooting.

  The magnet system 100 has a main magnetic field coil, a gradient coil, and an RF coil (not shown) inside. Each of these coils has a generally cylindrical shape, and is disposed coaxially with each other in a substantially columnar bore 110. The driving device described later moves the bed 200 on which the subject SB is placed into the bore 110 according to the imaging region.

  The console 300 is a part that controls the control system of the magnetic resonance imaging apparatus 400. The console 300 includes an input device 310 such as a keyboard or a mouse, a display device 320, and an arithmetic device 330. Normally, the console 300 is logged in for each operator and can be operated under conditions optimal for the operator.

  The computing device 330 has a computing unit 331 that performs system control and image processing, and performs overall system control and image reconstruction processing of the magnetic resonance imaging apparatus 400. The arithmetic device 330 includes a storage unit 332, and can store images and data, shooting protocols, various programs, and the like.

  The console 300 of this embodiment is connected to a network and connected to a hospital information system (not shown) of a hospital where the magnetic resonance imaging apparatus 400 is installed. Even when the magnetic resonance imaging apparatus 400 is not connected to the hospital information system via a network, the operator can respond by inputting the following personal information in advance and each time.

  The hospital information system has a patient information management system and an examination reservation system. The patient information management system is a database of personal information, medical data, test image data, test data, medication data, and the like of patients who have received medical care in the past at the hospital. The patient's personal information includes physical information such as height, weight, and transport method in addition to name, ID number, date of birth, age, sex, and the like. Such personal information is stored in the patient information management system at the time of outpatient visit and hospitalization.

  The examination reservation system creates an examination schedule for each examination day based on the information stored in the patient information management system for each modality (medical image diagnostic device) held by the hospital, and modifies the created examination schedule. Delivered to. For example, the examination schedule includes the order of patients to be examined in the magnetic resonance imaging apparatus 400, personal information including physical information of each patient, an imaging method and an imaging site (hereinafter referred to as order information). Note that the contents of the examination reservation system are sequentially updated as the medical treatment progresses on that day, and updated data is distributed to each modality each time it is updated.

  FIG. 2A is a top view of the bed 200. FIG.2 (b) is sectional drawing of AA of (a). The bed 200 includes a vertical drive unit 205 and a front-rear drive unit 206, and moves the subject SB between an initial position (home position) and an imaging position. The vertical drive unit 205 and the vertical movement control device 215 move the top plate 290 placed on the bed 200 in the vertical direction. The front-rear drive unit 206 and the front-rear movement control device 216 move the top plate 290 back and forth and convey it into and out of the bore 110. The vertical motion control device 215 and the longitudinal motion control device 216 are controlled by the console 300.

  As shown in FIG. 2, a sensor is provided at the edge of the top plate 290. The sensor has a second sensor 220 installed on the top of the top plate 290 and a first sensor 210 installed on the bottom of the top plate 290. A drive permission switch 230 is arranged in the vicinity of the first sensor 210.

  The first sensor 210 includes a contact sensor, a pressure sensor, and the like that can detect that a person has made contact and pressure. The first sensor 210 is formed at the lower part of the top plate 290 at both edges in the short axis direction with a length equivalent to the length of the top plate 290 in the long axis direction.

  Similarly, the second sensor 220 includes a contact sensor and a pressure sensor that can detect that a person has made contact and pressure. The second sensor 220 is formed at a length equivalent to the length of the top plate 290 in the major axis direction on both edges in the minor axis direction on the top plate 290.

  As the drive permission switch 230, a switch that can be turned on and off is used. The drive permission switch 230 may be a mechanical switch or an electrical switch. For safety, the drive permission switch 230 uses an automatic return type switch (push switch) that turns on when the switch is pressed and turns off when the switch is released. The drive permission switch 230 of the present embodiment is formed at one position below the top plate 290, in the vicinity of the central portion in the major axis direction, and on both sides in the minor axis direction. The drive permission switch 230 may be operable by the operator at any position on the top plate 290 using a tape switch having a length as an electrical contact. The drive permission switch 230 can also use a foot switch FT as shown in FIG.

  The first sensor 210 or the second sensor 220 and the drive permission switch 230 are used for the vertical movement of the top plate 290.

  The drive permission switch 230 and the first sensor 210 are used to raise the top plate 290. As illustrated by the hand HD1 shown in FIG. 2B, the operator touches the first sensor 210 while pressing the drive permission switch 230, and the top 290 is raised. In FIG. 2 (b), the hand HD1 is shown as touching the drive permission switch 230 and the first sensor 210 at one time with one hand of the operator. The drive permission switch 230 and the first sensor 210 may be operated with both hands.

  The drive permission switch 230 and the second sensor 220 are used for lowering the top plate 290. As illustrated by the hand HD2 shown in FIG. 2B, the operator touches the second sensor 220 while pressing the drive permission switch 230, so that the top 290 is lowered. In FIG. 2B, the hand HD2 is shown as touching the drive permission switch 230 and the second sensor 220 at one time with one hand of the operator, but the drive permission switch is separately used with both hands. 230 and the second sensor 220 may be operated.

  The ascending and descending of the top plate 290 is stopped by turning on / off the drive permission switch 230, and is also stopped by bringing the first sensor 210 and the second sensor 220 into a non-contact state. That is, since the movement of the top plate 290 stops when the operator releases his / her hand, the safety of the bed 200 is enhanced. For example, even if the subject SB grasps the top plate 290 and touches one or both of the first sensor 210 and the second sensor 220, the top plate 290 moves unless the operator turns on the drive permission switch 230. There is nothing.

  When both the first sensor 210 and the drive permission switch 230 are pressed, the vertical movement control device 215 operates the vertical drive unit 205 to raise the top plate 290. When both the second sensor 220 and the drive permission switch 230 are pressed, the vertical movement control device 215 operates the vertical drive unit 205 to lower the top plate 290. When either the first sensor 210 or the second sensor 220 and the drive permission switch 230 are turned off, the top plate 290 stops. The vertical movement control device 215 moves the top plate 290 at a slow first speed when the vertical drive unit 205 is operated, and after the threshold time elapses, the top plate is moved at a second speed higher than the first speed. 290 is moved. Further, the vertical movement control device 215 controls the top plate 290 to slowly rise when the three switches of the first sensor 210, the second sensor 220, and the drive permission switch 230 are on for a predetermined time or longer. Thus, it is possible to support the movement of the subject SB. Details will be described later.

  When the first sensor 210, the second sensor 220, and the drive permission switch 230 are off, and the height of the top plate 290 is a predetermined height, the longitudinal movement control device 216 operates the longitudinal drive unit 206. The top plate 290 is moved in the horizontal direction. When the carry-out switch 240 or the carry-in switch 250 installed in the magnet system 100 is pressed, the longitudinal movement control device 216 moves the top plate 290 horizontally into the bore 110. The forward / backward movement control device 216 moves the top plate 290 at a slow first speed when the forward / backward drive unit 206 is operated, and after a predetermined time has passed, The plate 290 is moved.

  As the carry-out switch 240 and the carry-in switch 250, automatic return type switches are used. The carry-out switch 240 includes a manual carry-out switch and an automatic carry-out switch (not shown). The carry-in switch 250 is also composed of a manual carry-in switch and an automatic carry-in switch (not shown). The top plate 290 moves in the horizontal direction only while the manual carry-out switch and the manual carry-in switch are turned on. When the manual carry-out switch and the manual carry-in switch are pressed, the top plate 290 moves at a slow first speed, and after a predetermined time, moves at a second speed that is faster than the first speed. Since the moving speed of the top plate 290 changes, the operator can shorten the time required for the horizontal movement of the top plate 290 and finely adjust the position of the top plate 290.

  An automatic return switch is also used for the automatic carry-out switch and the automatic carry-in switch. Once the automatic carry-out switch and the automatic carry-in switch are turned on, the top plate 290 moves to a predetermined position. The automatic carry-out switch and the automatic carry-in switch can not only move the top plate 290 in the horizontal direction but also raise and lower it. For safety reasons, when the automatic carry-out switch or the automatic carry-in switch is pushed again during the movement, the top plate 290 stops moving.

  In the present embodiment, the inspection procedure of the magnetic resonance imaging apparatus 400 is roughly classified into five inspection procedures. The first examination procedure is a procedure until the subject SB enters the imaging room of the magnetic resonance imaging apparatus 400 and places the subject SB on the top plate 290. The second inspection procedure is a procedure of installation and positioning of the receiving coil by the operator. The third inspection procedure is an imaging procedure through the console 300 by the operator. The fourth inspection procedure is a procedure from carrying out the top plate 290 to removing the receiving coil. The fifth inspection procedure is a procedure for lowering the subject SB from the top board 290. Hereinafter, each inspection procedure will be described in detail. However, since the first inspection procedure and the fifth inspection procedure are appropriately changed depending on the physical condition of the subject SB, the description will be made after the description of the second inspection procedure to the fourth inspection procedure.

<Second inspection procedure>
In the second inspection procedure, the operator installs the receiving coil and positions the photographing as necessary. In the second inspection procedure, order information has already been sent from the inspection reservation system to the console 300. That is, the reception coil and the imaging reference position required for the subject SB sleeping on the bed 200 are already stored in the console 300. Note that when the reception coil and the imaging reference position are not stored in the console 300, the operator can also set them manually.

<Flow chart of second inspection procedure>
FIG. 3 is a flowchart of the second inspection procedure.

  In step S21, the console 300 determines from the order information whether the subject SB needs to be fitted with a receiving coil. If it is necessary to mount the receiving coil, the process proceeds to step S22. If it is not necessary to mount the receiving coil, the process proceeds to step S23.

  In step S22, the top plate 290 stops at the installation position of the receiving coil. When the operator presses the drive permission switch 230 and the first sensor 210, the vertical movement control device 215 raises the top plate 290 to a preset installation position of the receiving coil. The installation position of the receiving coil to be set is set in advance for each logged-in operator. Further, the installation position of the receiving coil can be set for each order information. For example, since there are a variety of receiving coils ranging from small and light to large and heavy, the installation position of the receiving coil is changed for each order information. After the top plate 290 is stopped, the operator attaches a necessary receiving coil to the subject SB.

  In step S <b> 23, when the operator presses the drive permission switch 230 and the first sensor 210, the top plate 290 is moved up to a horizontally movable position. Then, after the top plate 290 rises to the horizontal movable position, the top plate 290 becomes movable to the inside of the bore 110. Depending on the order information, the installation position of the receiving coil may be a position where the top plate 290 can be moved in the horizontal direction.

  In step S24, the operator turns on an irradiation device for positioning (not shown) (hereinafter referred to as a laser pointer). The laser pointer is lit for a predetermined time when the carry-in switch 250 is pressed in conjunction with the carry-in switch 250 (manual carry-in switch and automatic carry-in switch).

  In step S25, it is desirable that the top plate 290 on which the subject SB is placed is moved into the bore 110 so that the position where the laser pointer is projected matches the imaging reference position (landmark). . When the carry-in switch 250 is turned on, the back-and-forth motion control device 216 operates the back-and-forth drive unit 206. Therefore, the operator turns on the carry-in switch 250, moves the top plate 290 to the position indicated by the laser pointer, and stops it at the photographing reference position. The operator visually matches the photographing reference position with the projection position of the laser pointer while using the manual carry-in switch.

  The longitudinal movement control device 216 confirms that the first sensor 210, the second sensor 220, and the drive permission switch 230 are not on, and that the height of the top 290 is within a predetermined range. Then, the longitudinal movement control device 216 operates the longitudinal driving unit 206. When any of the first sensor 210, the second sensor 220, or the drive permission switch 230 is on, the longitudinal movement control device 216 stops the horizontal movement of the top plate 290, and the operator checks whether there is any abnormality. After that, even if the first sensor 210, the second sensor 220, and the drive permission switch 230 are on, if the top plate 290 needs to be moved horizontally, the carry-in switch 250 is responded to the on state for a predetermined time, and the longitudinal movement control device 216 moves the top 290 at a low speed.

In step S <b> 26, the operator turns on the automatic loading switch to move the top plate 290 and carry the subject SB to the imaging position. Since the photographing reference position and the photographing position are always a fixed distance, the longitudinal movement control device 216 moves the top 290 by a fixed distance when the automatic carry-in switch is turned on.
The operator proceeds to the third inspection procedure after the second inspection procedure is completed.

<Third inspection procedure>
In the third inspection procedure, the operator starts photographing. The operator calls an imaging protocol via the console 300 and takes a desired image at a desired imaging site. The operator proceeds to the fourth inspection procedure after the third inspection procedure is completed.

<4th inspection procedure>
In the fourth inspection procedure, the operator carries out the subject SB for which imaging has been completed from the inside of the bore 110 and removes the receiving coil as necessary.

<Flow chart of fourth inspection procedure>
FIG. 4 is a flowchart of the fourth inspection procedure.

  In step S41, the operator pushes the carry-out switch 240 to carry the top plate 290 out of the bore 110 to a position where the top plate 290 can be moved up and down. By pressing the automatic carry-out switch once, the top board 290 is carried out to a position where the top board 290 can be moved up and down. In addition, when the manual carry-out switch is continuously pressed instead of the automatic carry-out switch, the top plate 290 is carried out to a position where vertical movement is possible.

  In step S42, the console 300 determines whether or not the receiving coil needs to be removed from the order information or the imaging information. If it is necessary to remove the receiving coil, the process proceeds to step S43. If it is not necessary to remove the receiving coil, the fourth inspection procedure is terminated and the process proceeds to the fifth inspection procedure.

  In step S43, when the operator presses the drive permission switch 230 and the second sensor 220, the top plate 290 is lowered to the receiving coil removal position. The removal position of the reception coil is the position where the reception coil is mounted in step S22 of FIG. The operator removes the receiving coil and proceeds to the fifth inspection procedure.

  The second inspection procedure to the fourth inspection procedure have been described above. However, the second inspection procedure can reduce the operation procedure shown in FIG. In the following modification, a simplified second inspection procedure will be described.

<Modification>
The second inspection procedure of this modification shortens the inspection time by reducing the operator's inspection procedure. Also in this modification, the console 300 acquires information on the reception coil and the imaging reference position in advance. The automatic carry-in switch of this modification is controlled by the calculation unit 331 of the console 300. And the movement of the top plate 290 when the automatic carry-in switch is pushed is different from the above-described example.

<Flow chart of second inspection procedure>
FIG. 5 is a flowchart of the second inspection procedure of this modification.

  In step S121, the console 300 determines whether or not it is necessary to attach the receiving coil to the subject SB from the order information. If it is necessary to mount the receiving coil, the process proceeds to step S122. If it is not necessary to mount the receiving coil, the process proceeds to step S123.

  In step S122, when the operator turns on the automatic carry-in switch, the top board 290 moves to the installation position of the receiving coil and stops. When the registered subject SB is not photographed and the height of the top plate 290 is near the knee height, the top plate 290 stops at the pre-registered receiving coil position. After the top plate 290 is stopped, the operator attaches a necessary receiving coil to the subject SB.

  In step S123, when the operator turns on the automatic carry-in switch, the top plate 290 starts to rise and then rises to a horizontal movable position. Next, the top 290 starts to move in the horizontal direction and moves to the photographing reference position. Further, when the automatic loading switch is turned on, the laser pointer is also turned on to irradiate the subject SB with the laser.

  The photographing reference position is determined by the photographing method or the photographing part. For example, in the case of head photographing, the photographing reference position that the operator matches with the laser pointer is a forehead. The head receiving coil used for head imaging is installed at a predetermined position on the top plate 290. For this reason, when the operator arranges the receiving coil for the head on the head of the subject SB, the laser pointer irradiates the laser near the forehead of the subject SB.

  When the reception coil is not required for photographing, the top plate 290 is raised and moved horizontally by only pressing the automatic carry-in switch once, and stops at the photographing reference position. The operator confirms whether the subject SB moved to the imaging reference position is at a predetermined imaging reference position. If necessary, the operator finely adjusts the top plate 290 in the horizontal direction using a manual carry-in switch.

  In step S124, the operator turns on the automatic loading switch to move the top plate 290, and loads the subject SB to the imaging position. When the automatic carry-in switch is turned on in the vicinity of the photographing reference position, the top board 290 moves horizontally by a certain distance.

  According to the second examination procedure of the present modification, when the operator presses the automatic carry-in switch twice or three times, the subject SB sleeping on the top 290 is carried to the imaging position. For this reason, the throughput of the second inspection procedure is improved.

  The horizontal movement of the top plate 290 described above is permitted only when the first sensor 210, the second sensor 220, and the drive permission switch 230 are not in contact. When any of the first sensor 210, the second sensor 220, or the drive permission switch 230 is contacted, the top plate 290 stops. That is, the first sensor 210 and the second sensor 220 not only function as a part of the up and down switches, but can be used as safety sensors.

  In the order information, a transport method is input as a part of the body information of the subject SB. The transport method is largely distinguished by a cart or a walk alone (can walk alone without using a cart). In the transport method using the carriage, a distinction between the stretcher 700 (see FIG. 11) and the wheelchair 800 (see FIG. 14) may be input. In the conveyance method of the present embodiment, a distinction is made between walking alone, the stretcher 700 or the wheelchair 800.

  The subject SB walking alone can move to the bed 200 in the photo studio by walking by himself / herself, and the subject SB in the stretcher 700 and the wheelchair 800 can use the stretcher 700 and the wheelchair 800 to sleep in the photo studio. 200 can be moved. Such order information is input to the storage unit 332. When the information of the walking alone, the stretcher 700, or the wheelchair 800 is not input to the storage unit 332, the operator manually checks whether the patient is walking alone, the stretchinger 700, or the wheelchair 800 by looking at the state of the subject SB. Enter in.

  The first inspection procedure and the fifth inspection procedure differ in inspection procedure depending on physical information. For this reason, the first embodiment for the first embodiment and the fifth inspection procedure for walking alone, the first embodiment for the stretcher 700 and the fifth inspection procedure for the second embodiment, and the wheelchair 800 for the third embodiment. The 1st inspection procedure and the 5th inspection procedure are shown.

<< First Embodiment >>
In the first embodiment, a first inspection procedure and a fifth inspection procedure for a self-examined subject SB will be described. A self-examined subject SB undergoing an examination by the magnetic resonance imaging apparatus 400 may have chronic diseases such as hemiplegia, low back pain, and joint pain. A subject SB with these chronic illnesses can walk by himself, but often has difficulty in sitting, standing, sleeping or waking up. Hereinafter, a procedure for supporting the operation of sitting and standing on the top 290 will be described with reference to FIGS.

<Flow chart of first inspection procedure>
FIG. 6 is a flowchart according to the first inspection procedure for walking alone. FIG. 7 is a view showing the vicinity of the entrance of the imaging room, and FIG. 8 is a schematic side view showing the operation of the subject SB and the operation of the top plate 290.

  In step S01, the operator registers the subject SB in the console 300. The operator acquires the order information of the subject SB by selecting the subject SB from the acquired examination schedule list. The body information of the subject SB is registered in the order information. In the first embodiment, single walking is selected as the transport method. Further, when the transport method is not input in the physical information, the operator selects walking alone.

  In step S02, the operator wears the reflector 600 near the knee of the subject SB. As shown in FIG. 7, the reflection plate 600 is simply attached to the knee position of the subject SB using a seal or an instrument. Usually, when entering the imaging room in the high magnetic field of the magnetic resonance imaging apparatus 400, the operator performs a pre-inspection by a metal detector to detect the body metal and the body metal of the subject SB. For this reason, the reflector 600 is attached to the subject SB at that time.

  In step S03, the operator causes the subject SB to enter the imaging room. As shown in FIG. 7, for example, a detection device 610 is installed in the entrance DR of the photographing room, and acquires height information of the reflecting plate 600 that passes therethrough. The detection device 610 uses a reflective photoelectric sensor or the like that emits light such as visible light or infrared light as signal light and detects light reflected by the reflection plate 600 with a light receiving unit. The detection device 610 detects the knee height information of the subject SB. Information on the knee height of the subject SB is transmitted to the console 300 and transmitted to the vertical movement control device 215. In the first embodiment, the knee height information is obtained by the reflector 600, but the computing unit 331 may calculate the knee height information based on physical information such as height or weight.

  In step S04, the vertical movement control device 215 stops the top plate 290 at the knee height. FIG. 8A is a view of the height of the top 290 stopped at the height of the knee. The vertical movement control device 215 moves the top plate 290 up and down based on the knee height information detected by the detection device 610 and stops the top plate 290 at the knee height of the subject SB. As shown in FIG. 8A, the vertical movement control device 215 moves the top plate 290 in the direction of the arrow AR1.

  In step S05, the operator determines whether the subject SB needs assistance. If support is required, the process proceeds to step S06, and if support is not required, the process proceeds to step S09.

  In step S06, the operator places the subject SB on the side of the bed 200. The vertical movement control device 215 moves the top plate 290 in the direction of the arrow AR2 as shown in FIG. When the operator presses the drive permission switch 230 and the first sensor 210, the vertical drive unit 205 operates and the top plate 290 rises. Further, when the automatic transfer switch is pressed, the top plate 290 is raised to a predetermined height.

  In step S07, the top plate 290 stops at the position of the buttocks of the subject SB, and the operator places the buttocks of the subject SB on the top plate 290. FIG. 8B is a view showing a state where the buttocks of the subject SB are touched by the second sensor 220. When the operator turns off the drive permission switch 230 or the first sensor 210, or when the buttocks of the subject SB touches the second sensor 220, the top 290 stops rising. Further, the vertical movement control device 215 may calculate the height of the buttocks by the calculation unit 331 from the physical information and automatically stop at the height. The operator places the buttocks of the subject SB on the top plate 290 stopped at a predetermined height.

  In step S08, the operator slowly lowers the top plate 290 by pressing the drive permission switch 230. As shown in FIG. 8B, the vertical movement control device 215 moves the top plate 290 in the direction of the arrow AR3. Since the second sensor 220 is in contact with the buttocks of the subject SB, the top plate is lowered when the operator turns on the drive permission switch 230. The top plate 290 stops when the operator turns off the drive permission switch 230 or when the buttocks of the subject SB no longer contact the second sensor 220. The bed 200 assists the subject SB who is difficult to sit down to sit comfortably.

  In step S09, the operator lowers the top board 290 to the knee height. FIG. 8C is a view showing a state in which the subject SB is sitting on the top 290 at the knee height. The operator can seat the subject SB on the top board 290 while holding the back of the subject SB with one open hand. In addition, by using the foot switch FT (see FIG. 2) for operating the drive permission switch 230 with the operator's foot, the operator can assist the subject SB with both hands.

  In step S <b> 10, the operator can lie down while assisting the subject SB at a knee height that is easy to sleep.

  In step S <b> 11, the operator confirms that the subject SB has slept at a predetermined position on the top plate 290 and performs an operation to raise the top plate 290. Thereafter, the process proceeds to the second inspection procedure described above.

<Flowchart of fifth inspection procedure>
FIG. 9 is a flowchart according to the fifth inspection procedure for walking alone. The fifth inspection procedure is a procedure for lowering the subject SB from which the receiving coil or the like has been removed in the fourth inspection procedure from the top plate 290. FIG. 10 is a schematic side view showing the operation of the subject SB and the operation of the top plate 290.

  In step S51, the operator manually lowers the top 290 to the knee height position of the subject SB when the operator presses the drive permission switch 230 and the second sensor 220. Alternatively, when the operator presses the switch once using the automatic carry-out switch, the top plate 290 is automatically lowered to the knee height position. As the knee height information, position information detected by the detection device 610 of the first examination procedure is used.

  In step S <b> 52, the operator causes the subject SB to take his / her foot from the top plate 290 and sit on the top plate 290. FIG. 10A is a view showing a state in which the subject SB is sitting on the top 290 at the knee height. The subject SB who is difficult to get up gets his feet out of the top board 290 with the help of the operator, and the subject SB sits on the top board 290. The most suitable position for the top plate 290 at the knee height of the subject SB is to sit with the subject SB sleeping.

  In step S53, the top plate 290 is raised by the operator pressing the drive permission switch 230 and the first sensor 210 in accordance with the rising motion of the subject SB. FIG. 10B is a view showing a state where the waist of the subject SB is lifted by the rising of the top board 290. The operator supports the standing of the subject SB by raising the top 290 with respect to the subject SB that is difficult to stand. The operator raises the top 290 while holding the waist of the subject SB or taking his hand. As shown in the first inspection procedure, the top plate 290 normally stops when the second sensor is touched while being raised, but the operator drives the subject SB in contact with the second sensor 220. By continuing to press the permission switch 230 and the first sensor 210, the stopped top plate 290 slowly rises.

  In step S54, when the vicinity of the buttocks of the subject SB is not in contact with the second sensor 220, or when the first sensor 210 or the drive permission switch 230 is turned off, the top 290 stops rising. . The stopped position is near the buttocks of the subject SB. FIG.10 (c) is the figure which showed the state which the top plate 290 stopped in the test subject SB vicinity. As a result, the subject SB that is difficult to stand up can be easily erected by the bed 200 supporting the operation of raising the waist. In addition, the operator who is an assistant can raise the subject SB only by holding the subject SB so as not to fall.

  In step S55, the operator confirms that the subject SB has stood up and leaves the imaging room.

  The magnetic resonance imaging apparatus 400 including the bed 200 that supports the operation of the subject SB can be provided for the subject SB capable of walking alone according to the first embodiment described above.

<< Second Embodiment >>
The second embodiment shows a transport method for transporting the subject SB with the stretcher 700. Normally, the stretcher that can enter the magnetic resonance imaging apparatus 400 is made of a non-magnetic material.

  FIG. 11 is a perspective view of a general stretcher 700. The stretcher 700 includes a bed surface 710 on which the subject SB is placed, a wheel unit 720, a height adjustment unit 730, a frame 740, and a reflection plate 600.

  The height adjusting unit 730 can change the height of the bed surface 710 via a drive unit (not shown) by a frame 740 having a pantograph structure. The bed surface 710 is a surface on which the subject SB is placed. A reflection plate 600 is installed on the side surface of the bed surface 710 in the short axis direction, and the reflection plate 600 is used when detecting the height of the bed surface 710 when entering the photographing room. The stretcher 700 can be moved by a wheel portion 720. In addition, although the reflective plate 600 is installed in one place on the side surface in the minor axis direction of the bed surface 710, it is also installed in one place on the opposite side surface (not shown).

  Usually, the stretcher 700 is used to move the subject SB who is difficult to sit down from the bed in the hospital room to the top plate 290 of the bed 200. First, the assistant uses the height adjusting unit 730 to align the bed surface 710 of the stretcher 700 with the bed height. Then, the assistant moves the subject SB from the bed to the bed surface 710. Next, the subject SB is transferred by the stretcher 700 to the imaging room at a remote location. The stretcher 700 is adjusted to a height suitable for transfer, and the height is approximately the height of the assistant's waist. Next, the stretcher 700 is placed on the bed 200 of the magnetic resonance imaging apparatus 400, and the operator lifts the subject SB and moves it from the stretcher 700 to the top plate 290. In general, the height of the top plate 290 that can be transferred into the bore 110 is higher than the height of the stretcher 700 during transfer.

<Flow chart of first inspection procedure>
FIG. 12 is a flowchart according to a first inspection procedure for the stretcher 700 of the second embodiment.

  In step S <b> 61, the operator registers the subject SB in the console 300. The operator selects the subject SB from the acquired examination schedule list and acquires the order information of the subject SB. The body information of the subject SB is registered in the order information, and the stretcher 700 is selected as the transport method in the second embodiment. When the transport method is not input in the physical information, the operator selects the stretcher 700.

  In step S62, the operator transfers the subject SB placed on the stretcher 700 to the imaging room. A detection device 610 (see FIG. 7) for detecting the reflector 600 is installed at the entrance of the photographing room. The detection device 610 acquires the height of the reflector 600 installed on the bed surface 710 of the stretcher 700 that passes therethrough. That is, the detection device 610 detects the height of the bed surface 710 that passes therethrough. The detected height information of the bed surface 710 is transmitted to the console 300 and transmitted to the vertical movement control device 215. Although the height information of the bed surface 710 is obtained by the detection device 610, the height of the bed surface 710 that is normally used may be registered in advance.

  In step S <b> 63, the vertical movement control device 215 moves the top 290 based on the height information of the bed surface 710 transmitted from the console 300. The height of the bed surface 710 of the stretcher 700 is easy to transfer. The vertical movement control device 215 may move the top plate 290 to the height of the bed surface 710 of the stretcher 700 registered in advance, and may move the error based on the height information from the detection device 610. .

  In step S <b> 64, the operator places the stretcher 700 on the bed 200 of the magnetic resonance imaging apparatus 400. Since the height of the bed surface 710 of the stretcher 700 is the same as the height of the top plate 290 of the magnetic resonance imaging apparatus 400, the operator and the caregiver immediately set the subject SB sleeping on the stretcher 700. The top plate 290 of the magnetic resonance imaging apparatus 400 can be moved. In addition, since the height of the top plate 290 and the height of the bed surface 710 match before the stretcher 700 is placed side by side, the bed 200 and the stretcher 700 do not ride on or bite each other. Thereby, the bed 200 or the stretcher 700 is not damaged, and the subject SB is not injured.

  In step S65, the operator and the assistant move the subject SB to the top board 290. After the operator and the assistant move the subject SB to the top board 290, the process proceeds to the second examination procedure.

<Flowchart of fifth inspection procedure>
FIG. 13 is a flowchart according to the fifth inspection procedure for the stretcher 700 of this embodiment. The fifth inspection procedure is a procedure for lowering the subject SB from which the receiving coil or the like has been removed in the fourth inspection procedure from the top plate 290.

  In step S <b> 71, when the operator presses the drive permission switch 230 and the second sensor 220, the top plate 290 is lowered to the height of the bed surface 710 of the stretcher 700. Alternatively, when the operator presses the automatic carry-out switch once, the top plate 290 is automatically lowered to the height position of the bed surface 710. The position information detected by the detection device 610 of the first inspection procedure is used as the height information of the bed surface 710. In addition, this step S71 becomes unnecessary by making the removal position of the receiving coil the same as the bed surface 710 of the stretcher 700 in the fourth inspection procedure.

  In step S <b> 72, the operator lays the stretcher 700 on the bed 200 of the magnetic resonance imaging apparatus 400. Usually, since the used stretcher 700 is held at the height on which the subject SB of the first examination procedure is placed, the height of the bed surface 710 of the stretcher 700 is the height of the top plate 290 of the magnetic resonance imaging apparatus 400. Same as height.

  In step S <b> 73, the operator and the assistant move the subject SB sleeping on the top plate 290 of the magnetic resonance imaging apparatus 400 to the bed surface 710 of the stretcher 700.

  In step S74, the operator leaves the subject SB placed on the stretcher 700 from the imaging room.

  The vertical movement control device 215 according to the second embodiment stops the top plate 290 when something touches the first sensor 210 or the second sensor 220 when the console 300 automatically raises or lowers the top plate 290. By controlling in this way, the couchtop 290 stops even when there are interferences around the bed 200, so that the bed 200 or the interferences can be prevented from being damaged.

<< Third Embodiment >>
The third embodiment shows a method for transporting the subject SB up to the bed 200 by the wheelchair 800. Normally, the wheelchair 800 that can enter the magnetic resonance imaging apparatus 400 is made of a non-magnetic material.

  FIG. 14 is a perspective view of the wheelchair 800. The wheelchair 800 includes a seat surface 810 on which the subject SB sits, a wheel portion 820, a frame 830, and a reflector 600.

  The wheelchair 800 can be moved by a wheel portion 820. The seat surface 810 is a surface on which the buttocks of the subject SB is placed. A reflecting plate 600 is installed on the side surface of the seating surface 810 on the wheel side, and the reflecting plate 600 is used to detect the height of the seating surface 810 when entering the photographing room. In addition, although the reflective plate 600 is installed at one place on the side surface of the seating surface 810 on the wheel side, it is also installed at one place on the side surface of the opposite wheel side that is not shown.

  Usually, the wheelchair 800 is used to move the subject SB who has difficulty in walking or walking to the bed 200. In general, the operator aligns the height of the seating surface 810 of the wheelchair 800 with the height of the top plate 290 of the magnetic resonance imaging apparatus 400, and lifts and moves the subject SB from the wheelchair 800 to the top plate 290.

<Flow chart of first inspection procedure>
FIG. 15 is a flowchart according to a first inspection procedure for the wheelchair 800 of the third embodiment.

  In step S81, the operator selects the subject SB from the acquired examination schedule list, and acquires the order information of the subject SB. The body information of the subject SB is registered in the order information, and the wheelchair 800 is selected as the transport method in the third embodiment. When the transport method is not input in the physical information, the operator selects the wheelchair 800.

  In step S82, the operator transfers the subject SB sitting on the wheelchair 800 to the imaging room. A detection device 610 (see FIG. 7) for detecting the reflection plate 600 is installed at the entrance of the imaging room, and the detection device 610 acquires height information of the reflection plate 600 that passes through. That is, the detection device 610 detects the height of the seating surface 810 of the wheelchair 800 that passes therethrough. The operator transfers the subject SB to the imaging room. The detected height information of the seating surface 810 of the wheelchair 800 is transmitted to the console 300 and transmitted to the vertical movement control device 215.

  In step S <b> 83, the vertical movement control device 215 moves the top plate 290 up and down and stops it at the height of the seat surface 810 of the wheelchair 800. The vertical movement control device 215 moves the top plate 290 up and down based on the transmitted height information of the seating surface 810 of the wheelchair 800. In general, since the height of the seating surface 810 of the wheelchair 800 does not change, the vertical movement control device 215 reaches the height of the seating surface 810 of the wheelchair 800 registered in advance when the wheelchair 800 is selected as the transport method. It may be moved.

  In step S84, the operator places the wheelchair 800 on the bed 200 of the magnetic resonance imaging apparatus 400. Since the height of the seating surface 810 of the wheelchair 800 and the height of the top plate 290 of the magnetic resonance imaging apparatus 400 are the same, the operator immediately places the subject SB sitting on the wheelchair 800 on the top of the magnetic resonance imaging apparatus 400. It can be moved to the plate 290.

  In step S85, the operator places the subject SB on the top 290. The operator moves the subject SB to the top 290 with assistance as necessary. The operator goes to the second examination procedure after sleeping the subject SB.

<Flowchart of fifth inspection procedure>
FIG. 16 is a flowchart according to the fifth inspection procedure for the wheelchair 800 of the third embodiment. The fifth inspection procedure is a procedure for lowering the subject SB from which the receiving coil or the like has been removed in the fourth inspection procedure from the top plate 290.

  In step S91, when the operator presses the drive permission switch 230 and the second sensor 220, the top plate 290 is manually lowered to the height position of the seating surface 810. Alternatively, when the operator presses the automatic carry-out switch once, the top plate 290 is automatically lowered to the height position of the seating surface 810. As the height information of the seating surface 810, position information detected by the detection device 610 of the first inspection procedure is used. In the case where the transfer method is the wheelchair 800, this step S91 is not required by making the receiving coil removal position the same as the seating surface 810 of the wheelchair 800 in the fourth inspection procedure.

  In step S <b> 92, the operator places the wheelchair 800 on the bed 200 of the magnetic resonance imaging apparatus 400.

  In step S93, the operator moves the subject SB to the wheelchair 800. The operator raises the subject SB sleeping on the top plate 290 of the magnetic resonance imaging apparatus 400 and causes the subject SB to sit on the seating surface 810 of the wheelchair 800. The subject SB moves his / her buttocks from the top plate 290 to the seating surface 810 of the wheelchair 800 from the state of sitting on the top plate 290. The operator assists the movement of the wheelchair 800 with assistance of the subject SB as necessary.

  In step S94, the operator causes the subject SB sitting on the wheelchair 800 to leave the imaging room.

  The vertical movement control device 215 of the third embodiment also stops the top plate 290 when something comes into contact with the first sensor 210 or the second sensor 220 when the top plate 290 is moved up and down automatically by an operation from the console 300. . By controlling in this way, the couchtop 290 stops even when there are interferences around the bed 200, so that the bed 200 or the interferences can be prevented from being damaged.

  As described above, the optimal embodiment of the present invention has been described in detail. However, as will be apparent to those skilled in the art, the present invention can be implemented with various modifications and variations within the technical scope thereof.

DESCRIPTION OF SYMBOLS 100 ... Magnet system 110 ... Bore 200 ... Bed 210 ... 1st sensor, 220 ... 2nd sensor 230 ... Drive permission switch 240 ... Carry-out switch, 250 ... Carry-in switch 290 ... Top plate 300 ... Console 310 ... Input device, 320 ... Display Device 330 ... Arithmetic unit 331 ... Arithmetic unit 332 ... Storage unit 400 ... Magnetic resonance imaging device 600 ... Reflector 610 ... Detection device 700 ... Stretcher 710 ... Bed surface, 720 ... Wheel unit 730 ... Height adjustment unit, 740 ... Frame 800 ... Wheelchair 810 ... Seat, 820 ... Wheel portion 830 ... Frame AR ... Arrow FT ... Foot switch SB ... Subject

Claims (10)

A top plate on which the subject is placed;
A top plate driving unit for moving the top plate in the vertical direction;
A movement permission switch that is arranged at an end of the top plate and determines permission or non-permission of movement of the top plate in the vertical direction by the top plate driving unit;
A first sensor that is disposed in the vicinity of the movement permission switch and below the top plate and detects a pressing force;
A second sensor that is disposed in the vicinity of the movement permission switch and on an upper side of the top plate, and detects a press;
When the movement permission switch is in a permitted state and the first sensor detects the pressing, a signal for raising the top plate is output to the top plate driving unit, and the movement permission switch is in a permitted state and the second A control unit for outputting a signal for lowering the top plate to the top plate driving unit when a sensor detects the pressing;
A bed apparatus comprising:   When the first sensor or the second sensor detects the pressing, the control unit outputs a signal for moving the top plate in the vertical direction at a first speed to the top plate driving unit. When the first sensor or the second sensor detects the press continuously for longer than a threshold time, a signal for moving the top plate in the vertical direction at a second speed faster than the first speed The couch device according to claim 1, wherein the couch device outputs to the top board driving unit. A knee height sensor for detecting the knee height of the subject;
The bed apparatus according to claim 1 or 2, wherein the control unit outputs a signal for moving the top plate to the knee height detected by the knee height sensor to the top plate drive unit.   The control unit raises the top plate moved to the knee height until the second sensor detects the subject's buttocks, and after the second sensor detects the buttocks, the knee height is increased. The bed apparatus according to claim 3, wherein a signal for lowering the top plate is output to the top plate drive unit.   The said control part outputs the signal which raises the said top plate moved to the said knee height to the position where the said 2nd sensor detected the said test subject's buttocks to the said top plate drive part. Sleeper device. A carriage sensor for detecting a carriage on which the subject is placed;
The said control part outputs the signal which moves the said top plate to the height suitable for the said cart to the said top plate drive part by the detection of the said trolley | bogie. Sleeper device.   The said control part outputs the signal which moves the said top plate to the height suitable for the said subject to the said top plate drive part based on the said patient's physical information provided from a hospital information system. The bed apparatus according to any one of claims 1 to 3.   The bed apparatus according to any one of claims 1 to 7, further comprising a longitudinal direction moving unit that moves the top plate in a longitudinal direction.   9. A medical image diagnosis using the bed apparatus according to claim 8, wherein the subject placed on the top plate is moved to a position where photographing within the bore of the gantry can be performed by the longitudinal movement means. apparatus. A medical image diagnostic apparatus that collects data reflecting the internal form of the subject and reconstructs an image representing the internal form of the subject,
A medical diagnostic imaging apparatus comprising the bed apparatus according to any one of claims 1 to 8.