WO2013073551A1 - 医用画像撮像装置および医用画像撮像装置用寝台 - Google Patents
医用画像撮像装置および医用画像撮像装置用寝台 Download PDFInfo
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- WO2013073551A1 WO2013073551A1 PCT/JP2012/079461 JP2012079461W WO2013073551A1 WO 2013073551 A1 WO2013073551 A1 WO 2013073551A1 JP 2012079461 W JP2012079461 W JP 2012079461W WO 2013073551 A1 WO2013073551 A1 WO 2013073551A1
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- main body
- plate
- connecting plate
- apparatus main
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- 238000002059 diagnostic imaging Methods 0.000 title claims description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 238000003384 imaging method Methods 0.000 claims description 25
- 238000002595 magnetic resonance imaging Methods 0.000 claims description 13
- 238000003032 molecular docking Methods 0.000 abstract description 45
- 238000006243 chemical reaction Methods 0.000 description 10
- 230000003068 static effect Effects 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G13/00—Operating tables; Auxiliary appliances therefor
- A61G13/10—Parts, details or accessories
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4411—Constructional features of apparatus for radiation diagnosis the apparatus being modular
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/70—Means for positioning the patient in relation to the detecting, measuring or recording means
- A61B5/704—Tables
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0487—Motor-assisted positioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4405—Constructional features of apparatus for radiation diagnosis the apparatus being movable or portable, e.g. handheld or mounted on a trolley
Definitions
- the present invention relates to a medical imaging apparatus, and more particularly, to a bed that can be detached from the apparatus main body.
- a medical imaging apparatus such as a magnetic resonance imaging (hereinafter referred to as MRI) apparatus or a CT apparatus has a structure in which a subject is mounted on a bed and inserted into an imaging space of the apparatus main body.
- the bed has a lifting mechanism that raises the top plate on which the subject is mounted to the height of the imaging space of the apparatus main body, and a horizontal movement that horizontally moves the top plate to insert the imaging portion of the subject to the center of the imaging space.
- This is a complicated configuration including a mechanism and a control unit that performs these movements according to control signals from the apparatus main body.
- the bed usually has a weight of several hundred kg, is accurately positioned, and is mechanically and electrically connected to the apparatus main body.
- the subject is transferred from a normal stretcher to a special stretcher made of a non-magnetic material and transported to the side of the bed of the MRI apparatus.
- transfer from bed to normal stretcher transfer from normal stretcher to non-magnetic stretcher, transfer from non-magnetic stretcher to bed of MRI equipment is required, and transfer is performed 3 times. become.
- Patent Document 1 discloses a bed that can be attached to and detached from the MRI apparatus main body.
- a docking mechanism 16 such as a guide 24 having a conical outer shape is provided in the lower front portion of the apparatus main body.
- a coupling mechanism that couples with the docking mechanism 16 is provided at the lower front end of the bed.
- the movement of the bed is guided by inserting a pair of pins 96 and 98 under the horizontal plate 100 along the conical guide 24 of the apparatus main body. If the horizontal plate 100 of the bed hits the docking point 32, the bed hook is fixed to the apparatus body by connecting the latch hook 58 at the bottom of the bed to the pin member 56 at the tip of the conical guide 24 of the apparatus body. is doing.
- the detachable bed needs to be held on the apparatus main body with sufficient force without shaking in the left-right direction (width direction) of the bed.
- the wide horizontal plate 100 is fixed to the front end of the bed, it hits the examiner's feet standing sideways when moving the bed, hindering the movement of the bed and the movement of the subject, Reduce operability. Further, even after the bed is connected to the apparatus main body, the wide docking mechanism and the wide horizontal plate 100 hit the examiner's feet, hindering access to the subject and reducing the operability.
- An object of the present invention is to provide a narrow docking mechanism that can connect a bed and an apparatus main body with a sufficient holding force at the time of docking and does not prevent an examiner from accessing a subject.
- an apparatus main body having an imaging function for a subject, a movable bed, and an apparatus main body side and a bed for detachably connecting the bed to the apparatus main body.
- a medical imaging device having a coupling mechanism arranged on each side is provided.
- the connecting mechanism on the bed side includes a connecting plate having one end fixed to the bed.
- the connection mechanism on the apparatus main body side includes a plurality of rollers arranged side by side along the shape of both sides of the connection plate of the bed. The plurality of rollers hold the connecting plate sandwiched from both sides.
- the perspective view of the medical imaging device of this embodiment 1 is a perspective view of the medical imaging apparatus of FIG. 1 with the bed 3 detached from the apparatus main body 2.
- 1 is a perspective view of the bed 3 in FIG. 1 is a perspective view of the device body 2 in FIG.
- Sectional view of the roller 9 of the roller unit 50 of FIG. 6 is a diagram showing the positional relationship between the support roller 12 of the roller unit 50 in FIG.
- FIG. 6 is a top view showing the arrangement of the rollers 9 of the roller unit of FIG. (a) to (f) Diagrams showing the operation of inserting the connecting plate 7 into the roller unit of FIG. Sectional drawing of the bed 3 and the roller unit 50 in a connected state in the first embodiment
- the medical imaging apparatus has the following configuration. That is, it has an apparatus main body having an imaging function of a subject, a movable bed, and a connection mechanism arranged on the apparatus main body side and the bed side in order to detachably connect the bed to the apparatus main body.
- the connecting mechanism on the bed side includes a connecting plate having one end fixed to the bed.
- the connection mechanism on the apparatus main body side includes a plurality of rollers arranged side by side along the shape of both sides of the connection plate of the bed. At the time of connection, the connection plate is sandwiched from both sides by a plurality of rollers and held.
- the two pairs of rollers among the plurality of rollers are arranged at positions where the connecting plate is sandwiched therebetween.
- the other plurality of rollers are preferably guide rollers that guide the connecting plate between the two pairs of rollers.
- the connecting plate has, for example, a width of the end portion on the apparatus main body side that is narrower than that of the end portion on the bed side, and both sides have a substantially trapezoidal shape that is linear. In this case, it is preferable that the two pairs of rollers are fixed at positions where both sides of the linear shape are sandwiched.
- connection mechanism on the apparatus main body side is configured to include a connection bar that engages with the hook.
- the bed is preferably provided with an operation unit for operating the hook and a connection mechanism for connecting the operation unit and the hook.
- the following medical image capturing apparatus has an apparatus main body having an imaging function of a subject, a movable bed, and a connection mechanism arranged on the apparatus main body side and the bed side in order to detachably connect the bed to the apparatus main body.
- One connection mechanism on the apparatus main body and the bed side includes a connection plate.
- the other coupling mechanism includes a holding member that is in contact with both side surfaces of the coupling plate at two or more points during coupling and sandwiches and holds the coupling plate from both sides.
- the connecting plate is included in a connecting mechanism on the bed side, and the holding member is included in a connecting mechanism on the apparatus main body side.
- the holding member may include two pairs of convex portions, and the two pairs of convex portions may be configured to be fixed at positions where the connecting plate is sandwiched from both side surfaces.
- two pairs of rollers can be used as the two pairs of convex portions.
- the connecting plate may be fixed so as to protrude toward the apparatus main body along the long axis direction of the bed.
- Both sides of the connecting plate are preferably linear.
- the holding member is configured to be held in contact with both sides of the linear connecting plate at two or more points.
- the connecting plate is, for example, a plate having a substantially trapezoidal shape in which the width of the end portion on the apparatus main body side is narrower than the width of the end portion on the bed side.
- the connecting mechanism including the holding member may include a guide member that guides the connecting plate and guides it between the holding members.
- a roller, a guide wall, a pin, etc. can be used for a guide member.
- the medical imaging apparatus 1 includes an apparatus body 2 and a bed 3 as shown in FIG.
- the apparatus main body 2 may have any configuration as long as it is configured to capture an image of the subject mounted on the bed 3.
- the main body of an MRI apparatus or CT apparatus can be used.
- MRI apparatus an MRI apparatus
- a case where the medical image capturing apparatus 1 is an MRI apparatus will be described as an example.
- the apparatus main body 2 includes a static magnetic field generator that generates a static magnetic field, a gradient magnetic field coil, a gantry including a radio frequency (RF) magnetic field pulse transmission coil and a shim plate, and a gantry cover that covers the gantry.
- the gantry static magnetic field generation device has a cylindrical shape with the axial direction horizontal, and the internal space of the cylinder is the imaging space, but the present invention is limited to the cylindrical static magnetic field generation device. It is not a thing.
- the MRI device is a power supply, control and signal processing system, gradient magnetic field power amplifier that supplies current to the gradient magnetic field coil, high frequency power amplifier that supplies high frequency signal to the RF magnetic field pulse transmission coil, high frequency amplification circuit, computer, operation Department and display.
- the apparatus body 2 is disposed in an electromagnetically shielded room, and the power supply, control, and signal processing system are disposed outside the electromagnetically shielded room, and are electrically connected to the apparatus body by a cable.
- the static magnetic field generator generates a static magnetic field in the imaging space, and the shim plate generates a magnetic field that improves the uniformity of the static magnetic field to a predetermined value or more.
- the gradient magnetic field coil generates a gradient magnetic field in a predetermined XYZ direction in the imaging space.
- the RF magnetic field pulse transmission coil transmits an RF magnetic field pulse to the imaging space.
- the computer outputs control signals to the gradient magnetic field power amplifier, the high frequency power amplifier, and the high frequency amplifier circuit, and controls the application timing and direction of the gradient magnetic field, the irradiation timing of the RF magnetic field pulse, and the like according to a predetermined imaging sequence.
- a nuclear magnetic resonance (NMR) signal generated from the subject is received by a receiving coil arranged in the vicinity of the subject.
- the high-frequency amplifier circuit detects and amplifies this signal under the control of the computer, and the computer reconstructs an image according to a predetermined image reconstruction program and displays it on the display.
- the operation unit receives imaging conditions and the like from the inspector.
- the bed 3 includes a top plate 31 on which the subject is mounted, a top plate holding unit 32 that holds the top plate 31, a frame that holds the top plate holding unit so as to be movable up and down, A vertical drive unit that moves the top plate holding unit 32 up and down, a horizontal drive mechanism that moves the top plate 31 in the horizontal direction with respect to the top plate holding unit 32, a horizontal drive unit that drives the horizontal drive mechanism, and a frame 4, four wheels 33 attached to the lower part, a bellows part 35 and a cover 36 that cover the outer periphery of the frame, and a handle part 11.
- the bed 3 is inserted into the imaging area by raising the top 31 to the height of the imaging space of the gantry of the apparatus body 2 and sliding the top 31 in the horizontal direction with respect to the top holder 32. can do. Thereby, the imaging region of the subject is transported to the center of the imaging space.
- the bed 3 is detachable from the apparatus body 2.
- the handle 11 of the bed 3 detached from the apparatus main body 2 can be pushed by hand to move to the anterior room where the magnetism of the apparatus main body 2 does not reach, the patient's room, etc. it can.
- the apparatus can be docked to the apparatus body 2 as shown in FIG.
- Docking units 4 and 5 are provided as connecting mechanisms on the front end of the bed 3 and the front of the apparatus main body 2, respectively. When the docking units 4 and 5 are fitted, the bed 3 is connected to the apparatus body 2. One or more pedals 6 are installed at the rear end of the bed 3.
- FIG. 3 A perspective view of the bed 3 is shown in FIG. 3, and a perspective view of the apparatus main body 2 is shown in FIG.
- FIG. 5 is a perspective view of the connecting plate 7 of the docking unit 4 on the bed 3 side.
- FIG. 6 is a perspective view of the roller unit 50 of the docking unit 5 on the apparatus main body 2 side.
- the docking unit 4 on the bed 3 side as shown in FIGS. 3 and 5 includes a connecting plate 7 having one end fixed to the frame 34 of the bed 3, a hook 8, a drive mechanism 41 for the hook 8, and a cover 37.
- the docking unit 5 on the apparatus body 2 side includes a roller unit 50 in which a plurality of rollers 9 are arranged, a connecting bar 10 for coupling to the hook 8, and a cover 53.
- the members constituting the docking units 4 and 5 are all nonmagnetic members.
- the connecting plate 7 of the bed 3 is inserted into the roller unit 50 of the apparatus body 2, and the connecting plate 7 is sandwiched between the plurality of rollers 9 from the side surface, so that the bed 3 is in the lateral direction (width direction of the bed 3). Fixed. Further, the hook 8 is connected to the connecting bar 10 so that the long axis direction of the bed 3 is fixed. At this time, one of the cover 37 and the cover 53 is configured such that one enters the other and does not collide.
- the outer shape of the connecting plate 7 is substantially trapezoidal, and has a straight portion 51 on both sides and a curved portion 52 at the tip.
- the connecting plate 7 can be strongly sandwiched and held by the rollers 9 from both sides.
- Each of the connecting plates 7 has a shape in which a rubber 73 is sandwiched between an upper plate 71 and a lower plate 72 that are substantially trapezoidal and made of nonmagnetic metal. The rubber 73 does not protrude outward from the upper plate 71 and the lower plate 72 at the straight portions 51 on both sides, and slightly protrudes from the upper plate 71 and the lower plate 72 only at the curved portion 52 at the tip. ing.
- the metal upper plate 71 and the lower plate 72 form the side surfaces of the connecting plate 7 in the straight portion, so that the connecting plate 7 is held by the roller 9 with a strong force. Further, since the rubber 73 protrudes slightly at the curved portion 52 at the tip, noise when the connecting plate 7 collides with the roller 9 is reduced. The relationship between the outer shape of the connecting plate and the holding force will be described in detail later.
- the drive mechanism 41 of the hook 8 is fixed at a predetermined position.
- the drive mechanism 41 of the hook 8 includes a hook support portion 42 fixed to the base portion of the hook 8, a convex portion 43 fixed to both sides of the hook support portion 42, and the convex portion 43 in the longitudinal direction of the bed 3.
- a slide guide 44 that is slidably guided along the wire, a wire 111 fixed to the rear end of the hook support 42, a wire guide 46, and a bar 47 on which the hook support 42 rides and lifts the tip of the hook 8. It has.
- the other end of the wire 111 is connected to the pedal 6 at the rear end of the bed 3.
- a spring 48 is disposed between the rear end of the hook support portion 42 and the wire guide 46, and urges the hook support portion 42 in a direction to advance forward.
- FIG. 5 is a perspective view, the spring 48 is depicted in a simplified manner for convenience of illustration.
- the spring 48 may be a spring having any structure.
- FIG. 7 shows the posture of the hook support portion 42, the pulling direction of the wire 111, and the biasing direction of the spring 48.
- the hook support portion 42 is pushed forward (in the direction of the hook 8) by the force of the spring 48 in a state where the wire 111 is not pulled, that is, in the state of FIG. 5, and the lower surface of the hook support portion 42 is placed on the bar 47.
- the tip of the hook 8 is lifted up.
- the wire 111 is pulled backward (in the direction of the pedal 6) by the operation of the pedal 6 by the inspector, the lower surface of the hook support portion 42 moves rearward along the slide guide 44 while sliding on the upper surface of the bar 47.
- the lower surface of the hook support portion 42 is curved upward at the tip portion, and as the tip moves upward, the tip 8 bent upward moves to the position of the bar 47, and the hook 8 at the tip moves downward while moving downward. Thereby, it is configured to be connected to the connecting bar 10 on the apparatus main body 2 side.
- the spring 48 urges the hook support portion 42 in the forward direction, the hook support portion 42 rides on the bar 47, the hook 8 rises upward, and the connecting bar 10 Deviate from.
- the roller unit 50 on the apparatus body 2 side is arranged between the upper plate 62, the lower plate 63, and the upper plate 62 and the lower plate 63, and is rotatably fixed.
- a plurality of rollers 9 are provided.
- the connecting plate 7 of the bed 3 is inserted into the space between the upper plate 62 and the lower plate 63, and the side surfaces are held by the rollers 9.
- the connecting bar 10 is fixed at a predetermined position on the upper plate 62.
- the upper plate 62 is cut out at a portion in front of the connecting bar 10.
- Fig. 8 shows a cross-sectional view of the roller 9.
- Both ends of the shaft 82 of the roller 9 are firmly fixed to the upper plate 62 and the lower plate 63 by screws 83 and washers 84.
- a sliding bearing 81 is disposed on the outer periphery of the shaft 82, and a roller 9 is disposed on the outer periphery of the sliding bearing 81.
- the roller 9 and the plain bearing 81 are integrated and rotate around the shaft 82.
- the shaft 82 and the roller 9 are made of a metal having high rigidity, and the sliding bearing 81 is also made of a material having high rigidity and good sliding.
- the plurality of rollers 9 in which the roller units 50 are arranged are composed of four (two pairs) support rollers 12 and a plurality of guide rollers 13 as shown in FIG.
- the support roller 12 comes into contact with the connection plate 7 at the final docking position, and fixes the connection plate 7 by sandwiching it from both sides.
- the guide roller 13 acts to guide the movement of the connection plate 7 and guide it to the docking position when the connection plate 7 is inserted into the roller unit 50.
- FIG. 9 is an explanatory diagram showing the positional relationship between the four (two pairs) support rollers 12 and the connecting plate 7 at the docking position.
- the four support rollers 12-1 to 12-4 are arranged so as to sandwich the straight portion 51 of the connecting plate 7 from both sides as shown in FIG. Specifically, a pair of the support roller 12-1 and the support roller 12-2 are arranged facing each other at a position near the frame 34 of the connection plate 7, and the support roller 12-3 is positioned near the tip of the connection plate 7. A pair of support rollers 12-4 are arranged facing each other.
- the distance between the support rollers 12-1 and 12-2 and the distance between the support rollers 12-3 and 12-4 are set to the same width as the width of each position of the connecting plate 1 in the docking position of FIG. .
- the connecting plate 7 is substantially trapezoidal, the interval between the support rollers 12-1 and 12-2 is wider than the interval between the support rollers 12-3 and 12-4. Accordingly, the connecting plate 7 is sandwiched between the four support rollers 12 in the docking position of FIG. 9 and does not advance any further, and is positioned at the docking position by the four support rollers 12.
- the bed 3 touches left and right, or the force that rotates about the connecting plate 7 works. Even in such a case, the connecting plate 7 can be held with a large holding force, which is preferable.
- FIG. 10 is an explanatory diagram showing the positional relationship between the guide roller 13 and the connecting plate 7 at the docking position.
- the guide roller 13-1 located on the bed 3 side of the support rollers 12-1 and 12-2 is located between the support rollers 12-1 and 12-2 on the entrance side of the roller unit 50. It arrange
- a guide roller 13-2 positioned between the support rollers 12-1 and 12-2 and the support rollers 12-3 and 12-4 is a connecting plate 7 inserted between the support rollers 12-1 and 12-2. The tip is corrected so as to be guided between the support rollers 12-3 and 12-4.
- the guide rollers 13-1 and 13-2 are securely held in contact with the side surfaces of the connecting plate 7 during docking, and the guide rollers 13-1 and 13-2 are not in contact with the connecting plate 7.
- 13-2 is disposed offset from the support roller 12 at a position farther from the connecting plate 7.
- the tip of the connection plate 7 is corrected by the position and angle deviation by contacting the guide roller 13-2 (FIGS. 11 (d) and (e)). It is guided between the support rollers 12-3 and 12-4 (FIG. 11 (f)). If the connecting plate 7 is inserted until the distance between the supporting rollers 12-1 and 12-2 and the distance between the supporting rollers 12-3 and 12-4 coincides with the width of the connecting plate 7 at that position, Since it can no longer be inserted, the movement of the bed 3 stops. This position is a docking position.
- FIG. 12 is a diagram showing the positional relationship between the bed 3 in the docking position, the connecting plate 7 and the roller unit 50. 12 is a cross-sectional view at the position A in FIG. 3.
- the docking unit 4 shows only the connecting plate 7 with the cover 41 removed, and the other components are omitted.
- the apparatus main body 2 shows only the support roller 12 and the guide roller 13 of the docking unit 5. As shown in FIG. 12, it can be seen that the bed 3 is held by the roller unit 50 of the apparatus body 2 by the connecting plate 7 narrower than the bellows part 35 in the short axis direction of the bed 3.
- the inspector operates the pedal 6 and pulls the wire 111, the hook 8 is lowered and moves in the direction of being pulled back (the bed 3 side), It connects with the connecting bar 10 on the apparatus body 2 side. Thus, the docking operation is completed.
- connection plate 7 When an external force in the left-right direction is applied to the bed 3 in the docked state, the connection plate 7 is pressed against the support roller 12 by the external force, and thus receives a roller reaction force from the pressed support roller 12.
- the roller reaction forces R1 to R4 are forces directed from the respective support rollers 12-1 to 12-4 in a direction perpendicular to the side surface of the connecting plate 7.
- the component force R1y to R4y in the left-right direction y (the width direction of the bed 3) of the roller reaction force and the external force balance with each other, and the bed 3 is held.
- the connecting plate 7 receives roller reaction forces R1 and R4 from the support roller 12-1 and the support roller 12-3, The component forces R1y and R4y are held in balance with the external force. That is, the force for rotating the bed 3 can be canceled by the moment of the support rollers 12 arranged in the long axis direction of the bed 3.
- component forces R1x to R4x in the bed longitudinal direction x of the roller reaction forces R1 to R4 are generated.
- the component forces R1x to R4x are forces in the direction in which the connecting plate 4 is pushed out from the apparatus main body 2.
- the tension of the wire 111 of the hook 8 balances with the component forces R1x to R4x, The connecting plate 4 is suppressed from being pushed out.
- the tension of the wire 111 is designed to be larger than the total of R1x to R4x.
- the support roller 12 when the support roller 12 is in contact with the curved portion 52 of the connecting plate 7 like the roller 92 shown by the dotted line in FIG. 9, the lateral component Ry of the roller reaction force R becomes small, and the bed The component force Rx in the major axis direction increases. For this reason, the force for holding the bed 3 in the left-right direction is reduced, while the force for pushing the bed 3 from the apparatus main body 2 is increased. Therefore, in the present embodiment, it is desirable that the four rollers 9 be arranged so as to be in contact with the straight portion of the connecting plate 7.
- the connecting plate 7 has a substantially trapezoidal shape and the straight portion 51 is inclined, when the bed 3 is attached to and detached from the apparatus body 2, the apparatus is viewed from an oblique direction as shown in FIG. It can be inserted into the docking unit 5 of the main body 2 or can be detached obliquely. Thereby, even if the electromagnetic shield room in which the apparatus main body 2 is arranged is narrow, the bed 3 can be attached and detached.
- the present invention is not limited to the substantially trapezoidal connecting plate 7. If the electromagnetic shield room where the device main body 2 is arranged is sufficiently wide and the bed 3 can be lowered straight until the connecting plate 7 is detached from the roller unit 50, the connecting plate 7 can be made substantially rectangular. It is. In this case, since the component force R1x to R4x of the roller reaction force R1 to R4 in the longitudinal direction x of the bed does not occur, it can be used to balance all the roller reaction force with the external force in the left and right direction applied to the bed 3. Can be improved. Further, the tension of the wire 111 can be reduced.
- the guide roller 13 is disposed, but part or all of the plurality of guide rollers 13 may be omitted.
- the length of the connecting plate 7 is preferably long, but it is not necessary to increase the width of the connecting plate 7. Therefore, the bed 3 and the apparatus main body 2 can be connected with a sufficient holding force when docked, but can be sufficiently held even if the width of the connecting plate 7 (the minor axis direction of the bed 3) is narrow.
- the width of the connecting plate 7 the minor axis direction of the bed 3) is narrow.
- the width of the connecting plate (the short axis direction of the bed 3) is narrower than the width of the bellows portion 35 (the short axis direction of the bed 3).
- the connecting plate 7 is arranged on the bed 3 side and the roller unit 50 is arranged on the apparatus main body 2 side.
- the roller unit 50 is arranged on the bed 3 side and the connecting plate 7 is arranged on the apparatus main body 2 side. It is also possible to do.
- the width of the roller unit 50 is wider than the width of the connecting plate 7, and therefore, from the viewpoint of securing a wider space for the feet of the inspector below the bed 3, the first embodiment Thus, it is preferable to arrange the connecting plate 7 on the bed 3 side.
- the tolerance of the positional deviation of the bed 3 with respect to the apparatus main body 2 is large, and the inspector can easily perform the work of docking the bed 3 on the apparatus main body 2. it can.
- the connecting plate 7 can be smoothly inserted into the roller unit 50.
- the rubber 73 is sandwiched between the upper surface plate 71 and the lower surface plate 72 of the connecting plate 7 so that the rubber 73 protrudes only at the curved portion 52.
- a roller unit 50 according to the second embodiment will be described with reference to FIG.
- the support roller 12 and the guide roller 13 of the first embodiment two pairs of support pins 112 and guide pins 113 that are not rollers (not rotated) are used.
- the positions of the support pin 112 and the guide pin 113 are the same as the positions of the support roller 12 and the guide pin 13, respectively.
- Other structures are the same as those in the first embodiment.
- the shafts and bearings of the rollers 12 and 13 are not required, so the number of parts can be reduced.
- a roller unit 50 according to a third embodiment will be described with reference to FIG.
- a guide wall 17 having the same shape as the curve 14 in FIG. 10 is installed.
- the guide wall 17 has a support point 18 at the same position as the four support rollers 12 of the first embodiment.
- the guide wall 17 contacts the connection plate 7 at four locations (two pairs) of supporting points (convex portions) 18 during docking, and holds the connection plate 7.
- the other part of the guide wall 17 guides the insertion of the connecting plate 7 in the same manner as the guide roller 13 of the first embodiment.
- Other structures are the same as those in the first embodiment.
- the material of the guide wall 17 so that the friction does not become excessive when contacting with the material of the connecting plate 7.
- one or both of the guide wall 17 and the connecting plate 7 are made of a material that is slippery.
- a connecting plate roller 19 can be installed on the outer periphery of the connecting plate 7 to reduce the coefficient of friction with the guide wall 17.
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Abstract
Description
医用画像撮像装置1は、図1に示すように装置本体2と寝台3とを備えている。装置本体2は、寝台3に搭載された被検体の画像を撮像する構成であればどのような構成であってもよい。例えば、MRI装置やCT装置の本体を用いることができる。ここでは、医用画像撮像装置1が、MRI装置である場合を例に以下説明する。
第1の実施形態のドッキングユニット4,5について具体的に説明する。
寝台3の斜視図を図3に、装置本体2の斜視図を図4にそれぞれ示す。図5は、寝台3側のドッキングユニット4の連結プレート7の斜視図である。図6は、装置本体2側のドッキングユニット5のローラユニット50の斜視図である。
これにより、装置本体2が配置されている電磁シールド室が狭くても、寝台3を着脱することが可能になる。
第2の実施形態のローラユニット50について、図13を用いて説明する。第2の実施形態では、第1の実施形態の支持ローラ12及びガイドローラ13に代えて、ローラではない(回転しない)2対の支持ピン112およびガイドピン113を用いる。支持ピン112およびガイドピン113の位置は、それぞれ支持ローラ12およびガイドピン13の位置と同じである。他の構造は、第1の実施形態と同様にする。
第3の実施形態のローラユニット50について、図14を用いて説明する。第1の実施形態の支持ローラ12及びガイドローラ13に代えて、図10の曲線14と同じ形状のガイド壁17を設置する。ガイド壁17は、第1の実施形態の4つの支持ローラ12と同じ位置に支持点18を有する。ガイド壁17は、ドッキング時に連結プレート7と4箇所(2対)の支持点(凸部)18で接触し、連結プレート7を保持する。ガイド壁17の他の部分は、第1の実施形態のガイドローラ13と同様に、連結プレート7の挿入をガイドする。他の構造は、第1の実施形態と同様にする。
Claims (15)
- 被検体の撮像機能を備えた装置本体と、移動可能な寝台と、前記装置本体に前記寝台を着脱可能に連結するために前記装置本体側および前記寝台側にそれぞれ配置された連結機構を有し、
前記装置本体および前記寝台側の一方の前記連結機構は、連結用プレートを含み、他方の前記連結機構は、連結時に前記連結用プレートの両脇側面にそれぞれ2点以上で接して、前記連結用プレートを両脇から挟みこんで保持する保持部材を含むことを特徴とする医用画像撮像装置。 - 請求項1に記載の医用画像撮像装置において、前記連結用プレートは、前記寝台側の連結機構に含まれ、前記保持部材は、前記装置本体側の連結機構に含まれることを特徴とする医用画像撮像装置。
- 請求項1に記載の医用画像撮像装置において、前記保持部材は、2対の凸部を含み、当該2対の凸部は、前記連結用プレートを両脇側面からそれぞれ挟み込む位置に固定されていることを特徴とする医用画像撮像装置。
- 請求項3に記載の医用画像撮像装置において、前記2対の凸部は、2対のローラ又は2対のピンであることを特徴とする医用画像撮像装置。
- 請求項2に記載の医用画像撮像装置において、前記連結用プレートは、前記寝台の長軸方向に沿って、前記装置本体へ向かって突出するように固定されていることを特徴とする医用画像撮像装置。
- 請求項1乃至5のいずれか1項に記載の医用画像撮像装置において、前記連結用プレートの両脇は、直線形状であり、前記保持部材は、前記直線形状の前記連結用プレートの両脇側面にそれぞれ2点以上で接して保持することを特徴とする医用画像撮像装置。
- 請求項6に記載の医用画像撮像装置において、前記連結用プレートは、前記装置本体側の端部の幅が前記寝台側の端部の幅よりも狭い略台形形状であることを特徴とする医用画像撮像装置。
- 請求項1乃至5のいずれか1項に記載の医用画像撮像装置において、
前記連結プレートを、前記保持部材側の連結機構とフックにより連結する機構をさらに有することを特徴とする医用画像撮像装置。 - 請求項1乃至5のいずれか1項に記載の医用画像撮像装置において、
前記保持部材を含む連結機構は、前記連結プレートをガイドして前記保持部材の間に導くガイド部材を有することを特徴とする医用画像撮像装置。 - 請求項9に記載の医用画像撮像装置において、前記ガイド部材は、ローラであることを特徴とする医用画像撮像装置。
- 請求項9に記載の医用画像撮像装置において、前記ガイド部材は、ガイド壁であることを特徴とする医用画像撮像装置。
- 請求項9に記載の医用画像撮像装置において、前記ガイド部材は、ピンであることを特徴とする医用画像撮像装置。
- 請求項1に記載の医用画像撮像装置であって、前記装置本体は、磁気共鳴イメージング装置であることを特徴とする医用画像撮像装置。
- 医用画像撮像装置に着脱可能で、移動可能な寝台であって、
前記医用画像撮像装置との連結機構を備え、
前記連結機構は、一端が固定され、他端が前記医用画像撮像装置に向かって突出した連結プレートを含み、当該連結プレートは、前記装置本体側の端部の幅が前記寝台側の端部よりも狭く、両脇は直線形状の略台形であることを特徴とする医用画像撮像装置用寝台。 - 請求項14に記載の医用画像撮像装置用寝台において、前記連結プレートの上にはフックが配置され、前記フックを操作するための操作部と、前記操作部と前記フックを連結する連結機構が備えられていることを特徴とする医用画像撮像装置用寝台。
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