JP2005296669A - Biomagnetism measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small biomagnetism examination device superior in handling performance of an examination engineer without compelling a burden and anxiety to a subject. <P>SOLUTION: This biomagnetism measuring device has a bed part 200 having a top plate 210 for placing the subject on its upper surface, and a cylindrical magnetic shield room 300 arranged on a floor surface in the predetermined positional relationship with the bed part 200. The bed part 200 has an examination part moving mechanism part 230 for moving an examination part 100 arranged on one end side in the longitudinal direction of the top plate 210 to the central side, and a top plate moving mechanism part 220 for moving the examination part moved to the central side in the magnetic shield room 300 together with the top plate 210. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

In the present invention, a highly sensitive superconducting quantum interference element (SQUID Superconducting Quantum Interferor) is applied to a magnetic field generated from a measurement target, for example, a weak magnetic field generated from a living heart or brain.
ence Device) The present invention relates to a small magnetic field measuring apparatus that uses a magnetometer to be used.

Conventionally, a magnetic field measuring apparatus using SQUID generates a magnetic field (hereinafter referred to as a magnetic field) generated from a living brain or heart.
(Referred to as biomagnetism). In the measurement of a weak magnetic field such as biomagnetism, it is necessary to attenuate the external magnetic field mixed in the magnetic field measuring apparatus to 80 dB-100 dB (decibel) or more. In the external magnetic field, magnetic noise derived from a power transmission line, a traveling train, an automobile, etc. is mixed into the magnetic field measuring device through a commercial power source.

A conventional biomagnetic measuring device is placed inside a magnetic shield room using a ferromagnetic material such as permalloy, and performs measurement in an environment where an external magnetic field is blocked. A magnetic shield room using a ferromagnetic material such as permalloy is expensive and large and has a limited number of medical institutions that can be installed. Biomagnetism measurement using a lighter, smaller and simple magnetic shield is desired so that it can be easily installed in a narrow place.

In response to such a request, a ferromagnetic material such as permalloy is formed in a cylindrical shape, a plurality of measuring magnetometers (hereinafter referred to as sensors) are arranged in the cylindrical opening, and a subject who is laid on a bed or the like There has been proposed a sensor that is inserted into the cylinder and can be detected by the sensor. In this proposal, the direction perpendicular to the detection surface composed of a plurality of sensors is arranged in a direction perpendicular to the cylindrical central axis (x-axis), thereby enabling measurement without the influence of an external magnetic field. It is. However, in this proposal, although the principle of the magnetic shield room formed in a cylindrical shape has been proposed, no practical proposal has been made.

On the other hand, in order to facilitate measurement of the subject in the magnetic shield room, a sensor is attached to the bed so as to be movable, and the sensor can be positioned without placing a burden on the subject when the subject is laid on the bed. A bed has been proposed.

JP 2000-175874 A JP 2002-136492 A

According to the above proposal, a weak magnetic field can be measured without providing a large shield room, which can greatly contribute to the miniaturization of the biomagnetic field measuring apparatus. However, this proposal does not specifically disclose how to put a subject placed in a bed into or out of the cylindrical magnetic shield room. Such an apparatus is a major problem in practical use because it is required that the laboratory technician can easily perform work without causing the subject to bear a burden or anxiety even in various situations.

One possible solution is to movably attach the detector to the bed. However, since the conventional example is based on the premise of working in a wide magnetic shield room, application to a cylindrical magnetic shield room is not considered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small biomagnetic field inspection apparatus that is easy to handle for a laboratory technician without imposing a burden or anxiety on a subject.

In order to achieve the above object, the biomagnetic field measurement apparatus of the present invention has a bed portion having a top plate for placing a subject on the upper surface thereof, and a cylindrical shape installed on the floor surface in a predetermined positional relationship with the bed portion. The bed portion includes an inspection unit moving mechanism unit that moves an inspection unit provided on one end side in the longitudinal direction of the top plate to the center side, and the inspection unit that has moved to the center side. A top plate moving mechanism for moving into the magnetic shield room together with the top plate is provided.

ADVANTAGE OF THE INVENTION According to this invention, the small biomagnetic field test | inspection apparatus with a favorable tester's handleability is provided, without putting a burden and anxiety on a test subject.

Hereinafter, the biomagnetic field measuring apparatus according to the present invention will be described in detail with reference to FIGS. Further, in the following description, a cardiac magnetic measurement device that measures a magnetic field emitted from the heart using a test object as a living body will be described as an example. However, the present invention is not limited to this example. For example, the present invention can also be applied to an inspection apparatus that detects magnetism, such as the presence or absence and the amount of a magnetic substance included in a general inspection object, and the distribution of the magnetic substance. The following disclosure is only one embodiment of the present invention, and does not limit the technical scope of the present invention. Further, the same parts and functions are denoted by the same reference numerals, and redundant description is omitted.
(Example 1)
1 to 12 show a cardiac magnetic field measuring apparatus according to the first embodiment. FIG. 1 is an external view of the apparatus, FIG. 2 is a measurement principle diagram, FIGS. 3 and 4 are component configuration diagrams, FIGS. 5 to 9 are external views of the apparatus, FIG. 10 is an operation control apparatus diagram, and FIGS. FIG.

First, with reference to FIG. 1, the schematic structure of the cardiac magnetic measurement apparatus according to this embodiment will be described.

In FIG. 1, this cardiac magnetic measurement apparatus includes a bed unit 200 having an inspection unit 100 including a measurement magnetometer (hereinafter referred to as a sensor) using a SQUID (superconducting quantum interference device), and the inspection unit 100 at the time of measurement. A magnetic shield room 300 that is internal and excludes external magnetic fields;
It includes a data collection and analysis device 400 that adjusts magnetic field data obtained from the inspection unit 100, sets measurement conditions, performs various types of analysis, and the like, and a magnetic field measurement drive device 500 that analyzes magnetic field data collected from the sensor. Composed.

The bed unit 200 and the magnetic shield room 300 are installed on the floor in a predetermined positional relationship, and the other data collection and analysis device 400 and the magnetic field measurement drive device 500 are appropriately installed in the vicinity of the magnetic shield room 300. In this embodiment, by providing the data collection and analysis device 400 adjacent to the magnetic shield room 300, the operability of the laboratory technician is improved.

The bed part 200 is disposed on a base part 201 fixed to the floor surface, a top plate 210 disposed on the upper surface of the base part 201, and an upper portion on one end side in the longitudinal direction of the top plate 210. The inspection unit 100 is configured. Further, the top plate 210 is provided so as to be movable in the longitudinal direction of the top plate 210 via the top plate moving mechanism unit 220, and the inspection unit 100 is provided on the top plate 210 via the inspection unit moving mechanism unit 230. Attached so as to be movable in the longitudinal direction. In FIG. 1, the top plate moving mechanism unit 220 and the inspection unit moving mechanism unit 230 are shown in a moving direction, and details are shown in FIGS.
I will explain it.

Here, the longitudinal direction of the top plate 210 is the X direction, and the top plate 210 orthogonal to the X direction.
The short direction is defined as the Y direction, and the height direction is defined as the Z direction.

On the other hand, the magnetic shield room 300 has a cylindrical appearance, and the cylindrical opening 301 is provided.
The central axis P is set to coincide with the X direction. Further, the cylindrical opening 301 has a size for allowing the top plate 210 provided with the inspection unit 100 to be contained therein, and the top plate 21.
A top plate support means 310 for supporting one end portion of 0 is provided.

As described above, the cardiac magnetic field measuring apparatus includes the first and second moving mechanism units including the top plate moving mechanism unit 220 and the examination unit moving mechanism unit 230, so that the subject can use the top plate 21.
Measurement is performed with the first open state lying in 0 (the state shown in FIG. 1), the second state (the state shown in FIG. 12) in which the laboratory technician matches the test unit 100 to the affected part of the subject, and excluding the external magnetic field. It is possible to easily take the third state (the state shown in FIG. 2).

In order to obtain the effect, one of the features of this embodiment is that the retreat position of the inspection unit 100 is provided on one end side in the longitudinal direction of the top plate 210 (magnetic shield room 300 side). 100 is provided to be movable along the X direction. That is, in this embodiment, in the first state in which the subject lies on the top plate 210, the inspection unit 100 is retracted on one end side in the longitudinal direction of the top plate 210, and therefore the top plate 210 on which the subject lies. The space around is open. For this reason, the subject can lie on the top plate 210 without feeling uncomfortable, and can easily perform the care of the laboratory technician.

And in this embodiment, the said test | inspection part 100 is moved to the site | part which should be test | inspected of the lying test subject via the said test | inspection part moving mechanism part 230, and it can change from a 1st state to a 2nd state easily. Can be changed.

In this embodiment, since the site to be examined is the heart, the subject lies on his / her back on the bed portion 211 provided on the top plate 210 so that the head is located on the examination unit 100 side. Since the examination unit 100 has a tunnel shape and is supported on both sides of the top plate 210, the examination unit 100 is passed through the subject's head and the shortest distance from the heart, which is a site to be examined. It can be moved with. Therefore, the inspection engineer can check that the inspection unit 100 has the top plate 21.
In the second state moved from the center of 0, the inspection unit 100 can be aligned with the heart of the subject lying on the top plate 210 in an open space outside the magnetic shield room 300, Further, the sensor can be aligned. Further, the inspection unit moving mechanism unit 2
Since the moving distance of the inspection unit 100 by 30 can be shortened, it can contribute to downsizing of the apparatus.

In this embodiment, when the inspection unit 100 is moved to the most end side in the longitudinal direction of the top plate 210, the inspection unit 100 is moved outward from one end of the bed portion 211 on which the subject lies. The inspection unit moving mechanism unit 230 is arranged and operated so as to project. This
It can be reduced that the length of the top plate portion 210 in the longitudinal direction is made longer than necessary.

Further, the inspection unit 100 sets the width of the inspection unit 100 to a size that can be accommodated within the projected area of the top plate 210 when viewed from above, and further, in the movement, is set to be movable within the projected area. . Thereby, the safety in movement of the inspection unit 100 can be improved without increasing the size of the opening 301 of the magnetic shield room 300.

In addition, one of the other features of the cardiac magnetic measurement apparatus is that the top plate 210 is moved toward the retracted position of the examination unit 100 by including the top plate moving mechanism unit 220. This is a possible point. Accordingly, the test unit 100 maintaining the positional relationship between the subject and the test unit 100 positioned at a predetermined position of the test subject is inserted into the magnetic shield room 300 at a predetermined position, The second state can be changed to the third state. In addition, a top plate support mechanism 310 that supports one end of the top plate 210 to be inserted is provided in the opening 301 of the magnetic shield room 300.
In the third state in which one end of the top plate 10 is pulled out, the top plate 210 can be supported by the top plate moving mechanism unit 220 and the top plate supporting mechanism 310, so that the top plate moving mechanism unit 220 can be downsized. Can contribute.

One of the other features of the cardiac magnetic field measuring device is that in the first state, the inspection unit 100
Is that the bed portion 200 and the magnetic shield room 300 can be installed so as to be accommodated in the opening 310 of the magnetic shield room 300. Thereby, since the installation space | interval of the said bed part 200 arrange | positioned on a straight line and the said magnetic shield room 300 can be shortened, installation property can be improved. Further, from the subject, the inspection unit 10
Since a part of 0 can be concealed, a feeling of pressure on the subject by the inspection unit 100 can be reduced.

One of the other features of the cardiac magnetic field measuring device is that the top plate moving mechanism unit 220, the test unit moving mechanism unit 230, and the gantry position adjusting mechanism unit 150 in the test unit 100 (FIG. 3).
4) and the top plate lifting mechanism 240 (described in FIGS. 3 and 4) are automated by a moving mechanism that does not generate a magnetic field, and the operation switches are centrally arranged in one place. In this embodiment, the influence of the magnetic field is reduced by employing a hydraulic mechanism, but other driving means that does not generate a magnetic field may be used.

Further, in this embodiment, the operation unit 250 is disposed on one side of the top plate in the approximate center in the X direction. Since this position is in the vicinity of the position of the subject's waist, the laboratory technician can use this top plate 21.
It is easy to provide assistance to a subject who gets on and off 0, and an inspection engineer can operate the operation unit 25.
While operating 0, it is easy to observe the state of the examination unit 100 passing through the upper part of the subject lying on the top board 210, and the alignment of the sensor to the heart can be performed while visually observing.

In addition, in this embodiment, consideration is given to safety by providing the moving mechanism with various sensors.

Hereinafter, the cardiac magnetic measurement apparatus according to this embodiment will be described in more detail with reference to FIGS.

First, the measurement principle using the cylindrical magnetic shield room 300 will be described with reference to FIG. 2A and 2B are cross-sectional views showing a third state, in which FIG. 2A is a vertical cross-sectional view, and FIG. 2B is a cross-sectional view.

In FIG. 2, in the third state, inside the magnetic shield room 300, the top plate 210 on which a subject holding his head with a pillow lies, and the examination unit 100 positioned on the heart of the subject is arranged. The A cooling container 101 is disposed in the inspection unit 100, and a plurality of sensors 102 and a first reference sensor 103 are disposed at the bottom inside the inspection container 100.
It is cooled by a liquid refrigerant filled with 01. In this embodiment, a sensor (magnetometer) made of a high-temperature superconductor capable of operating at the temperature of liquid nitrogen is used, and the sensors 102 and 103 are cooled by putting liquid nitrogen into the cooling container 101. The cooling container 101 is held by a gantry 104 having an alignment mechanism.

The position of the gantry 104 for fixing the cooling container 101 is adjusted by a gantry position adjusting mechanism 150 having a moving mechanism in the Y direction and the Z direction. In this embodiment, the gantry position adjustment mechanism 150 is provided with a hydraulic mechanism that does not generate a magnetic field, and the position of the gantry 104 can be adjusted by this hydraulic mechanism.

Units arranged inside the magnetic shield room 300 such as the top plate 101 and the inspection unit 100 are made of a nonmagnetic material such as FRP (reinforced plastic) or aluminum.

The detection coils of the plurality of sensors (measuring magnetometers) 102 are arranged on the same measurement surface Q parallel to the XY plane perpendicular to the Z direction, and the surfaces of the detection coils are perpendicular to the Z direction. The sensor 102 detects a magnetic field component in the Z direction. The first reference sensor 103 is provided to detect the X-direction component of the external magnetic field, and is arranged in the vicinity of the sensor 102 so that the magnetic field detection direction is the X direction.

The driving operations of the plurality of sensors 102 and the first reference sensor 103 are controlled by the magnetic field measurement driving device 500 connected via a signal line 160. In the magnetic field measurement driving device 500, each sensor An analog signal corresponding to the magnitude of the detected magnetic field is processed by an analog signal processing circuit including an amplifier, a band pass filter, and a notch filter.

The signal line 160 includes a plurality of cables, a bundle of cables for transmitting signals detected from the sensor 102 and the first reference sensor 103 to the magnetic field measurement driving device 500, and the magnetic field measurement driving device 500. The sensor 102 and the first reference sensor 103 are composed of a bundle of cables for supplying a bias current, a feedback current, and a heater current.

The output of the magnetic field measurement driving device 500 is converted into a digital signal and is taken into the data collection and analysis device 400. In the data collection and analysis apparatus 400, various signal processes are executed on the captured signals.

The external magnetic field includes three components in the X, Y, and Z directions. The shielding performance of the cylindrical magnetic shield room 300 is excellent in the Z and Y directions perpendicular to the X direction shown in FIG.
The component in the Y direction is greatly attenuated inside the cylindrical magnetic shield room 300.

On the other hand, the X and Y direction components of the external magnetic field are orthogonal to the magnetic field detection direction of the sensor (SQUID magnetometer) 102, and most of the components are not detected by the sensor 102. Therefore, the external magnetic field in the Y direction which is shielded by the magnetic shield room 300 and the sensitivity of the sensor (SQUID magnetometer) 102 is low can be ignored in practice.

Most of the components in the Z direction of the external magnetic field can be canceled by calculating the difference between the output signals of adjacent sensors 102. The difference can be calculated after the data collection and analysis apparatus 400 takes in the data.

The data collection and analysis apparatus 400 calculates the difference between the output signals of the adjacent sensors 102 from
A first measurement signal in which the X-direction component of the external magnetic field is corrected by subtracting the value obtained by multiplying the measurement signal from the first reference sensor 103 by the first predetermined coefficient, thereby reducing the influence of the external magnetic field. The operation for obtaining is performed.

As described above, in this embodiment, by providing the structure, it is possible to perform measurement in a conventionally magnetically shielded room even in a place without a large magnetic shield facility. Can be significantly reduced, and the installation space of the apparatus can be reduced. Moreover, in this embodiment, since the subject is measured in the cylindrical magnetic shield room 300 that penetrates, the feeling of closure and anxiety are reduced. Furthermore, since there is an inspection engineer adjacent to the small cylindrical magnetic shield room 300, the subject's anxiety is reduced.

Next, with reference to FIG. 3 and FIG. 4, the component structure of a bed part is demonstrated. FIG. 3 is a part development view of the bed portion, and FIG. 4 is a part configuration diagram.

3 and 4, as described above, the bed part 200 includes the base part 201, the top plate 210, and the inspection part 100. In this embodiment, the base 20
1, a leg 202 fixed to the floor, a top support 203, a top lifting mechanism 240 disposed between the leg 202 and the top support 203, and the top It comprises a bellows-like cover 204 that covers the elevating mechanism 240 and the top plate moving mechanism 220 attached to the top support 203.

The top plate support portion 203 has a thin box shape in the Z direction with the top open, and the top plate moving mechanism 220 is disposed in the open space. The top plate support portion 203 is provided with support rails 205 on both sides in the X direction, and the top plate 210 is movable via a slide rail (not shown) that supports the support rail 205 from both sides, and the top plate Plate support 20
3 is attached so as to cover the upper part. The operation unit 250 is provided at the center of the side surface of the top plate support unit 203.

The top plate moving mechanism 220 is composed of one or a plurality of hydraulic cylinders. SQUI
Since the sensor 102 using ID measures a weak biomagnetic field, a moving mechanism unit that generates a magnetic field such as a motor cannot be used. In this embodiment, the top plate moving mechanism 22
By providing all the moving mechanisms including 0 with hydraulic cylinders such as the top plate moving mechanism section 220, the moving mechanism section is automated.

The top plate moving mechanism 220 of this embodiment includes an antenna-like cylinder 22 that expands and contracts in multiple stages.
1 and the intermediate member 2 so that the longitudinal direction of the cylinder 221 coincides with the X direction.
22 are arranged in a column. Then, two cylinders are installed flat on one end and 1 on the other end.
Arrange a cylinder of books. Further, the cylinder on one end side is fixed to one end side of the top plate support portion 203, and the cylinder on the other end side is fixed to the top plate 210. Further, the intermediate member 222 is provided such that both sides thereof are guided along the inner wall of the top plate support portion 203 and are movable along the X direction.

Note that the oil feeder that supplies the hydraulic pressure to the cylinder 221 generates a magnetic field, and is therefore arranged outside the examination room.

Thus, in this embodiment, by arranging the cylinders 221 in a column, the size (diameter) of the cylinders 221 can be suppressed, and the movable distance of the top plate 210 can be increased. Further, by adopting a multistage cylinder, the movable distance of the top plate 210 can be further increased. Further, the cylinder 221 is connected in a column with an intermediate member 222, and
By supporting the intermediate member 222 movably on both sides, the strength can be increased.
In addition, since the top plate moving mechanism 220 can be made thin, the thin top plate support 2
03 can be realized. In addition, by using the intermediate member 222 and the pair of cylinders 221, it is possible to reduce backlash when the top plate 210 is moved.

In addition, the top plate elevating mechanism 240 can be configured with various mechanisms. In this embodiment, a hydraulic system is adopted. Thereby, generation | occurrence | production of a magnetic field is suppressed, a test subject tends to lie on the said top plate 210, and the adjustment of the height direction which reduces the burden concerning a measurement engineer's waist is possible. The top plate elevating mechanism 240 has a bellows-like cover 20 in consideration of safety and design.
4 is covered.

The top plate 210 includes a frame member 212, the bed portion 211, and the inspection unit moving mechanism unit 23.
Consists of zero. The frame member 212 is formed in a frame shape, and inspection unit support rails 213 for moving the inspection unit 100 are attached to both sides in the X direction.

The inspection part support rail 213 is provided so as to project to one end side (the magnetic shield room 300 side) in the X direction, and a support groove 214 is formed from the projecting part toward the other end side. In this embodiment, the inspection unit 100 is supported on the upper part of the inspection unit support rail 213 and moves. At this time, a projection 106 is provided on the slide surface on the inspection unit 100 side, and the projection 106 is attached through the support groove 214 in the Z direction.
The inspection unit 100 can move in the X direction without detaching the inspection unit support rail 213.

The couch portion 211 is formed by attaching a mat of cushioning material to the upper surface of a plate material, so that the subject can lie without a sense of incongruity. The top plate 210 forms a thin space with the frame member 212 and the bed portion 211, and the thin inspection portion moving mechanism portion 230 having the same structure as the top plate moving mechanism portion 220 in this space. Is arranged. One end of the inspection unit moving mechanism 230 is attached to one end of the frame member 212,
The other end is attached to the inspection unit 100.

The inspection unit 100 includes a gate-shaped inspection unit main body 105 viewed from the X direction, the gantry unit 104 disposed on the top surface of the inspection unit 100, the cooling container 101 provided in the gantry unit 104, The gantry position adjusting mechanism 150 adjusts the position of the gantry 104.

The inspection unit main body 105 has a gate-like appearance formed by covering the upper surface and both sides with a top plate and side plates, and the front and rear portions in the X direction are covered with a flat plate at the top and an opening 109 with the bottom open. ing. Thus, when the gantry unit 104 is retracted to the top, the gantry unit 104
Is substantially concealed to improve the anxiety and design of the subject. A pair of side plates extending downward are attached to the pair of inspection unit support rails 213 to support the entire inspection unit 100 in a movable manner. At this time, the opening 10 penetrating in the X direction between the pair of side plates.
9 is formed, the examination unit 100 can be moved in the X direction so that the subject lying on the top plate 210 can be inserted into the opening 109.

The protrusion 106 is provided on one end of the lower end of the side plate. This protrusion 10
6 is attached so as to penetrate the support groove 214 of the inspection unit support rail 213,
The ends are connected by a connecting rod 107. Then, as shown in FIG. 2, one end of the inspection unit moving mechanism unit 230 is attached to the connecting rod 107. According to this structure, the support groove 2
The length L7 of 14 can be shortened, and the strength of the inspection unit support rail 213 can be improved.

3 and 4, the gantry unit 104 has a box-shaped appearance for housing the cooling container 101, and is movably supported by the inspection unit main body 105 by the gantry position adjustment mechanism unit 150. . The gantry position adjustment mechanism 150 moves the cooling container 101 to Z
A Z-direction adjusting mechanism 151 that moves in the direction, and a Y-direction adjusting mechanism 152 that moves the cooling container 101 in the Y direction. The Z-direction adjusting mechanism 151 and the Y-direction adjusting mechanism 152 have the same structure as the top plate moving mechanism 220. Z direction adjusting mechanism 1
51 is disposed on the inner wall surface of the side plate, and can move the gantry 104 in the Z direction. The Y-direction adjusting mechanism 152 is attached to the gantry 104 and can move the cooling vessel 101 in the Y direction. According to the gantry position adjustment mechanism 150 provided with these two moving mechanisms, the cooling container 10 that becomes the measurement surface Q is used.
The bottom surface of 1 can be aligned with a predetermined position of the subject.

In order to align the measurement surface Q with the affected area of the subject lying on the top plate 210, the X direction of the top plate 210, the Y direction orthogonal to the X direction, and the Z direction are necessary. In this embodiment, the adjustment in the X direction is performed by the inspection unit moving mechanism unit 230, and the Y direction and the Z direction are performed by the gantry position adjustment mechanism unit 150. As a result, the number of alignment movement mechanisms can be reduced. Of course, the gantry position adjusting mechanism 150 may be provided with a moving mechanism for adjusting in the X direction. In this case, the inspection unit moving mechanism 230 may be moved to an approximate position, and the inspection unit moving mechanism 230 may be finely adjusted.

Next, with reference to FIG. 5 and FIG. 6, the external structure and dimension system of a bed part are demonstrated. FIG.
FIG. 6 is an external perspective view of the bed part in the state 1, FIG. 6 is an external view of the bed part in the first state, (a) a top view, (b) a front view, (c) a right side view, FIG. 4D is an enlarged view of the operation unit.

First, in FIG. 5, the bed portion 200 according to this embodiment includes the top plate support portion 2.
03, the top plate 210 attached to the top of the top plate support portion 203, and the leg portion 20
By making 2 into a thin rectangular shape that is substantially the same in the X direction, two thin rectangular plates are connected by the cover 204 having a small bellows shape. Moreover,
The inspection unit 100 provided on one side of the top plate 210 in the longitudinal direction is a box having the same lateral width as the top plate 210, so that the entire bed unit 200 has a clean external shape in the longitudinal direction. .

A first emergency stop button 215 for bringing the moving mechanism portion into a free state is provided at an end portion of the top plate support portion 203 projecting in the longitudinal direction, and the top adjacent to the first emergency stop button 215 is provided. A handle 216 for manually moving the top plate 210 is provided at the end of the plate 210. Thus, when an emergency occurs in the third state, the first emergency stop button 21
5 can be operated to bring the moving mechanism portion into a free state, and the top plate 210 can be pulled out from the magnetic shield room 300 via the handle 216 immediately. Moreover, the first
1 emergency stop button 215 is arranged on the vertical surface of the end portion of the top plate support portion 203, so that it is difficult to operate erroneously, and the handle 216 is provided large on the upper surface of the end portion of the top plate 210. Therefore, the drawer operation is good.

In this embodiment, the second emergency stop button 217 is provided on the vertical surface of the inspection unit 100 on the operation unit 250 side. As a result, an inspection engineer who operates the operation unit 250 and the data collection and analysis apparatus 400 can immediately reach the free movement state of the moving mechanism unit. Further, the position of the vertical plane on which the second emergency stop button 217 is arranged is also a position where it is difficult to perform an erroneous operation.

Further, in this embodiment, by attaching a mark 218 to the center of the bed portion 211, the subject can recognize the position where he / she lies down. In this embodiment, the mark 218 is provided approximately at the center in the X direction of the bed portion 211 as a measure of the waist position when the subject lies down. The mark 218 is provided by embedding a cushioning member having a color different from that of the cushioning material mat covering the upper portion of the bed portion 211 in the mat. In addition, the mark 218 has a C shape, and encourages the subject to get on the top board 210 from the open side of the C shape.

Accordingly, in this embodiment, the operation unit 250 is provided on the side opposite to the opened side of the C type. As a result, the side where the laboratory technician and the subject are located is clarified to reduce erroneous operations.

An opening / closing lid 108 is provided on the upper surface of the inspection unit 100. This open / close lid 10
8 is for replenishing the cooling container 101 with a liquid refrigerant. In this embodiment, since the upper surface of the inspection unit 100 is flat, the open / close lid 108 can be provided with a simple structure.

In FIG. 6, in this embodiment, the height H1 from the floor surface to the top surface of the bed portion 211 is set to 715 mm to improve the workability of the laboratory technician. In general, if the workability of the vertical posture is set in the range of 600 mm to 900 mm, the workability of most inspection technicians can be covered. In particular, in this embodiment, since the subject lies on the bed portion 211, the height is set so that the subject can be sufficiently cared for. In this embodiment, the height H1 up to the top surface of the bed portion 211 is set as a reference height, and the magnetic shield room 3 is used.
A height of 00 is set.

The top plate 210 has a width W0 of 700 mm and a length L1 of 2150 mm. In this embodiment, the handle 216 is provided on one end side of the top plate 210 and the inspection part 100 is partially overlapped on the other side, so that the bed part 211 visible from the upper surface is provided.
The horizontal width W1 is 600 mm and L3 is 1750 mm. The size of L3 is
When the subject having a standard height is used as a reference, the length is slightly shorter.
Since the opening 109 having a height H4 of 425 mm is formed on the subject side, the size of the subject lying substantially includes the inside of the inspection unit 100. The size is such that the inspection unit 100 hardly touches the head. In this embodiment, the installation space can be reduced by setting the size of L3 smaller. Furthermore, even a subject who is tall can respond by placing a heel on the handle 216.

The couch portion 211 is formed with a concave curved surface with a concave shape at the center and raised on both sides when viewed from the X direction, and the subject easily has a shape lying on the center of the couch portion 211. Therefore, the subject is encouraged to lie on his / her back at the standard position of the bed portion 211 by the concave curved surface of the bed portion 211 and the mark 218. Work can also be made easier.

Moreover, since the inspection part support rails 213 having a width of 50 mm are provided on both sides of the bed part 211, the inspection part can be stably supported. Furthermore, if it is this width, the said support groove | channel 214 can be formed maintaining intensity | strength.

The inspection unit 100 having a height H2 of 725 mm is provided on one side of the top of the top plate 210. The height H0 from the floor surface to the top surface of the inspection unit 100 is set to 1450. Accordingly, since the height H0 to the top surface is set lower than the position of the standard adult eye line, the volume feeling of the entire apparatus can be reduced.

Further, since the inspection unit 100 is set to be approximately the same size as the lateral width W0 of the top plate 210, it is a size that does not make the subject feel the size of the apparatus. Moreover, this inspection unit 10
Since the whole 0 is a box shape with rounded corners, the feeling of pressure and fear of the subject can be reduced. In addition, safety and design when the inspection unit 100 is moved are also improved.

Further, in FIG. 4C, an opening 109 having a lateral width W3 of 600 mm and a height H4 of 425 mm is formed at the lower portion of the inspection unit 100. If the size of the opening 109 is large, even a large person can be accommodated in the opening 109. Furthermore, a storage space having a height H5 of 310 mm concealed from the surroundings is formed at the top of the opening 109. If the storage space has this size, the cooling container 101 having a diameter of 300 mm and a height of 285 mm can be accommodated to be concealed from the subject and the laboratory technician. Moreover, if the width is W0,
The size of the cooling container 101 can be finely adjusted in the Y direction.
Meanwhile, the bed portion 200 has the same size as the top plate 210 and the leg portion 202.
Installed on the floor. In this embodiment, in the first state shown in FIG. 6, since the inspection unit 100 is retracted to one side of the top plate 210, the top plate elevating mechanism 240 is
The inspection unit 100 is biased toward the retracted position. This enables stable installation in the first state, which is a normal state, and widens the lower limb space on the other end side in the X direction facing the retracted position, so that handling and a small impression are possible. It is good.

Next, in FIG. 4D, in this embodiment, the operation switches of the moving mechanism unit are concentrated on the operation unit 250 disposed on the side surface of the top plate support unit 203. This operation unit 25
0 is arranged in an intermediate portion between the mark 218 and the retreat position of the inspection unit 100. This position is the best position for grasping the movement of the subject and the entire apparatus, and is a position that can easily cope with changes in various situations. And since this position is also a position where inspection technicians frequently come and go, in view of safety, the position is formed in a circular outer shape as viewed from the top.

The operation unit 250 includes a pair of up / down switches 251 of the top / bottom lift mechanism 240.
A pair of movement switches 252 of the inspection unit movement mechanism unit 230, an adjustment switch group 260 of the gantry position adjustment mechanism unit 150, a movement switch 253 that drives the top plate movement mechanism unit 220, and a return switch 253. I have.

One of the up / down switches 251 is a down switch, the other switch is an up switch, and returns to the reference height when the up switch is continuously pressed. One of the movement switches 252 is moved from the retracted position to the inspection unit 100.
The other switch is a switch for moving in the direction of the retracted position.

The adjustment switch group 260 is provided with a lock switch 261 at the center thereof, and viewed from the inspection engineer, the Z-direction adjustment mechanism portion 15 is located at a vertical position across the lock switch 261.
A pair of raising / lowering switches 262 for raising and lowering 1 is provided, and a pair of movement switches 263 for operating the Y-direction adjusting mechanism 152 are provided at the left and right positions. With this operation, the lock switch 261 locks the gantry position adjusting mechanism 150 and the inspection unit moving mechanism 230, and the positional relationship between the subject and the sensor 102 is fixed. The movement switch 253 is a switch for moving the top plate 210 to a predetermined position in the magnetic shield room 300 to be in the third state, and the return switch 253 is the first switch from the third state to the first state. It is a switch for returning to the state.

The switches are an up / down switch 251 and a move switch 2 according to the operation procedure.
52, the adjustment switch group 260, the movement switch 253, and the return switch 253 are arranged in this order to reduce erroneous operations and improve operability.

Next, the magnetic shield room will be described in detail with reference to FIGS. 7 is an external perspective view of the magnetic shield room, FIG. 8 is a component configuration diagram of the magnetic shield room, FIG. 9 is an external view of the magnetic shield room, (a) is a left side view, (b) is a front view, and (c) ) Is a plan view, (d) is a transverse sectional view, (e) is a longitudinal sectional view, and (f) is a partially enlarged sectional view of the opening.

First, the schematic structure of the magnetic shield room 300 will be described with reference to FIG. In this embodiment, as viewed from the X direction, a quadrangular cylindrical outer shape with rounded corners is provided. The magnetic shield room 300 includes the cylindrical shield room main body 320 and leg portions 350 that support the shield room main body 320 below. The shield room main body 320 includes a pedestal 302 in the cylindrical opening 301, and the pedestal 3
The top plate support means 310 is provided on the upper surface of 02. In this embodiment, the top plate support means 310 is constituted by a pair of support rails, and the support rail provided on the bottom surface of the top plate 210 is supported. The pedestal portion 302 is provided at a position slightly behind the end of the opening 301. In this embodiment, in the first state of the bed portion 200,
This is because the inspection unit 100 is housed in the opening 301 together with the top plate 210. In the state of being accommodated in the opening 301, the top plate 210 is moved up and down by the top plate elevating mechanism 240. For this reason, the pedestal portion 302 is provided so as to recede backward so as not to disturb the vertical movement of the top plate 210. That is, the magnetic shield room 300 has a role as a retracting and storing unit of the inspection unit 100 in the first state in addition to the purpose of the magnetic shield for the original measurement.

As the bed portion 200 changes from the second state to the third state, the pedestal portion 302 supports one end of the top plate 210 and the top plate in the third state. 2
10 is supported together with the top plate moving mechanism 220 at both ends in the longitudinal direction. As a result, the load on the top plate moving mechanism 220 can be reduced, which can greatly contribute to the downsizing of the top plate moving mechanism 220.

Although not shown in the figure, the pair of support rails of the top plate support means 310 are formed with inclined corners at the end portions, and rollers are provided at the end portions of the support rails provided on the bottom surface of the top plate 210. Is provided. Accordingly, the top plate support means 31 is moved along with the movement of the top plate 210.
When the support rails of the top plate 210 come into contact with a pair of zero support rails, the roller can easily ride on the inclined surface, so that the top plate 210 can be moved smoothly.

In FIG. 8, in this embodiment, the shield room main body 320 is replaced with a cylindrical exterior body 3.
21, a cylindrical interior body 322 that is slightly smaller than the exterior body 321, a plurality of adjustment members 323 that adjust a gap between the interior body 322 and the exterior body 321, and the shield room body 32.
A frame-shaped decorative cover 324 constituting both end portions in the X direction of 0 and the pedestal portion 302 are configured.

The exterior body 321 and the interior body 322 are made of permalloy, which is a ferromagnetic material. Since permalloy requires heat treatment, in this embodiment, the exterior body 321 and the interior body 322 are used.
Is uniquely formed. In this embodiment, in order to reduce the weight while increasing the efficiency of eliminating the external magnetic field, the shield room main body 320 is composed of the exterior body 321 and the interior body 32.
A double structure composed of two members is provided, and a plurality of adjusting members 323 are provided between the two members to adjust the positional relationship between the two members.

Further, the parts other than the exterior body 321 and the interior body 322 are made of a nonmagnetic material such as FRP (reinforced plastic) or aluminum.

In this embodiment, the assemblability can be improved by adopting the component configuration. For example, when assembling the magnetic shield room 300, first, the leg portion 350 is attached to the bottom surface of the exterior body 321, and the pedestal portion 302 is attached to the interior body 322. Then, the interior body 3 is placed inside the exterior body 321 via the adjustment member 323.
22 and then the decorative cover 324 can be attached.

In this embodiment, the pedestal 302 is attached to the interior body 322, but may be integrally formed. Further, as in this embodiment, the pedestal portion 302 does not necessarily have a size that covers the lower portion of the cylindrical opening portion 301. The top plate support means 3
10 may be provided, so that a protrusion for attaching the top plate support means 310 may be used.

Next, in FIG. 9, in this embodiment, the magnetic shield room 300 from the floor surface.
The height H6 to the top surface of the screen is 1600 mm, and the height H of the shield room body 320 is
10 is set to 1400 mm, the lateral width W4 is set to 1000 mm, and the depth L4 is set to 1800 mm. The cylindrical opening 301 has a height H7 of 1200 mm and a lateral width W5 of 800 mm. In this embodiment, in order to reduce the overall volume feeling of the magnetic shield room 300, the leg 350 is made one size smaller so that only the size of the shield room body 320 is conspicuous. It is said.

In this embodiment, since the cylindrical opening 301 is used as a storage space for the inspection unit 100 in the first state, the height H7 of the opening 301 is set. Otherwise, it may be 840 mm which is a substantial opening height H9 excluding the height H8 (360 mm) of the pedestal portion 302.

However, the subject feels uneasy when inserted into the opening 301 having a small opening. Further, in order to eliminate the extraneous magnetic field, a certain depth L4 of the magnetic shield room 300 is required. Therefore, in order to insert the subject at a predetermined position of the magnetic shield room 300, a long stroke is provided. The top plate moving mechanism unit 220 is required.

Therefore, in this embodiment, the opening 301 is used as a retracted position of the inspection unit 100 in the first state, and its height H10 is the top plate 210 in the first state.
Is set to a height that can be sufficiently stored even when lowered, and a depth L5 in which the pedestal portion 302 is retracted. The substantial height H9 and lateral width W5 of the opening 301 are determined by the inspection unit 1
The top plate 210 with 00 is large enough to be stored in a predetermined position. Thereby, the said subject is solved.

Moreover, in this embodiment, as shown to (F) figure, the inclined surface is formed in the inner part of the decorative panel. Thereby, since the opening of the opening 301 can be shown wider, the anxiety of the subject can be eased.

Furthermore, in this embodiment, a holding tool 303 for holding the signal line 160 is provided on the upper part on the other end side of the opening 301. Accordingly, since the signal line 160 drawn out from the inspection unit 100 to the rear of the opening 301 is held with a clearance, the movement of the inspection unit 100 in the X direction can be smoothly performed while reducing disconnection. it can.

Next, with reference to FIG. 10, FIG. 11, and FIG. 12, the operation and operation method of the moving mechanism and the like will be described. FIG. 10 is an apparatus block diagram showing the circuit mechanism of the bed section. FIG. 11 is an external view of the use state in which the bed portion and the magnetic shield room are combined, and (a) is an external perspective view.
(B) The figure is a side view. FIGS. 12A and 12B are reference diagrams showing use and operation states, where FIG. 12A is a cross-sectional view illustrating the operation from the first state to the second state, and FIG. 12B is a cross-sectional view illustrating the third state. .

First, with reference to FIG. 10, the apparatus configuration of the operation control of the bed part 200 will be described. The bed portion 200 includes the top plate lifting mechanism portion 240, the top plate moving mechanism portion 220, the inspection portion moving mechanism portion 230, the Z direction adjusting mechanism portion 151, and the Y direction adjusting mechanism portion 152. The control part 270 which controls the gantry position adjustment mechanism part 150 to be provided is provided.
The control unit 270 includes a storage device 27 that stores operation programs for the plurality of moving mechanism units.
1, the operation unit 250 that operates the plurality of moving mechanism units, and a plurality of position sensors 272 that detect operation positions of the plurality of mechanism units are connected. In addition, an oil feeder that supplies hydraulic pressure to the moving mechanism is included, but is omitted here.

In addition, the setting of the operation program of the control unit 270 can be set by the data collection and analysis apparatus 400.

Next, the operation of the cardiac magnetic measurement device in accordance with the operation of the operation unit 250 shown in FIG. 6 (d) will be described with reference to FIGS.

First, in this embodiment, in the stopped state, the first state indicated by the dotted line in FIGS. 11 and 12A is taken. In this first state, the longitudinal direction (X direction) of the top plate 210,
The bed part 200 and the magnetic shield room 300 are installed in a straight line so that the central axis P of the cylindrical opening part 301 coincides. The inspection unit 100 is accommodated in the cylindrical opening 301. The subject uses this cardiac magnetic measuring device from the M direction, and the laboratory technician uses the cardiac magnetic measuring device from the N direction.

In the first state, the laboratory technician uses the up / down switch 2 provided in the operation unit 250.
The top switch 210 can be lowered according to the height of the subject by operating the 51 down switch.

As shown in FIG. 12, in this embodiment, the height H1 from the floor surface to the top surface of the bed portion 211 is 315 m downward from the reference value (home position) 715 mm in the first state.
m, that is, the top surface of the bed portion 211 can be lowered to a position 400 mm from the floor surface. The position of this lowest point is high enough for the elderly to sit on the top surface.
The inspection engineer operates the up / down switch 251 to set the optimum height, causes the subject to sit down in the vicinity of the mark 218, and lies on his back so that the head is on the inspection unit 100 side. Can help and assist.

Next, the inspection engineer operates the up switch of the up / down switch 251 to raise and lower the top plate 210 to the reference value in the first state. Here, when the up switch is operated, the control unit 270 operates to raise and lower to the reference value when the down switch is not operated. Thus, when the transition from the second state to the third state occurs, the pedestal 3
It is possible to prevent the top plate 210 from colliding with 02.

Further, when the up switch is operated and raised to the reference value, the control unit 270 stores the position where the up switch is operated in the storage device 271 as a return position.

Next, the laboratory technician can operate the movement switch 252 to move the inspection unit 100 in the retracted position to the heart region through the subject's head. Since the movement switch 252 includes a pair of switches that move in the X direction, the examination unit 100 can be aligned with the heart of the subject by operating these switches. At this time, since the operation unit 250 is provided between the mark 218 and the magnetic shield room 300, the user can operate the operation unit 250 with his / her right hand while looking into the opening 109 of the inspection unit 100. Alignment work can be performed. In addition, since the position of the top plate 210 is set to a height that does not impose an unreasonable posture on a standing posture inspection technician, the workability of the inspection technician can be improved.

Here, in this embodiment, the moving distance L6 of the inspection unit 100 can be moved from the retracted position to the mark 218. Thereby, a test subject's upper body (from a head to the position of a waist) can be covered. In the case of the lower body, the subject may be reversed and laid.

Next, the laboratory technician can finely adjust the position of the sensor 102 by operating the pair of lift switches 262 and the pair of movement switches 263 of the adjustment switch group 260. First, in this fine adjustment, the elevating switch 262 is operated to lower the cooling container 101 including the plurality of sensors 102 to the vicinity of the subject's heart. The position sensor 272 is provided at the lower end of the cooling container 101, and the position sensor 272 is set so as to emit a signal when there is an obstacle at a predetermined distance set in advance. In this embodiment, the position sensor 27
2 can be set to emit a signal at a first predetermined distance and a second predetermined distance.

For example, when the position sensor 272 transmits a first predetermined distance signal, the control unit 270 fixes the position of the inspection unit moving mechanism unit 230 and further receives a second predetermined distance signal. The operation of the Z-direction adjusting mechanism 151 is stopped. In this embodiment, the first
The predetermined distance is set to 100 mm, and the second predetermined distance is set to 5 mm.

With this setting, since the position of the inspection unit moving mechanism unit 230 is fixed when the first predetermined distance is reached, the cooling container 101 that has become lower as the inspection unit 100 moves.
Can be prevented from hitting the subject's jaw. Further, since the operation of the Z-direction adjusting mechanism 151 stops when the second predetermined distance is reached, the cooling container 101 can be prevented from being pressed against the subject.

Further, the inspection engineer operates the movement switch 263 to adjust the sensor position in the Y direction. Then, the inspection engineer sets the lock switch 26 after the adjustment of the sensor position is completed.
1 is operated. When the lock switch 261 is operated, the control unit 270 operates the top plate elevating mechanism unit 240, the inspection unit moving mechanism unit 230, and the gantry position adjusting mechanism unit 1 operated so far.
The position of 50 is fixed, and the operation from the switch for operating these is invalidated. Thereby, an erroneous operation can be prevented.

Next, the inspection engineer operates the movement switch 253. When the movement switch 253 is operated, the control unit 270 operates the top plate moving mechanism unit 220 to change the preset magnetic shield from the state shown in FIG. The top plate 210 is moved to a predetermined position in the room 300.

Thereafter, the inspection engineer can perform various measurements by operating the data collection and analysis apparatus 400. Then, after finishing these measurements, the laboratory technician operates the return switch 253. When the return switch 253 is operated, the control unit 270 operates to return the subject to the return position on the top board 210. This return method and the operation order of the various movement mechanisms can be freely set. For example, first, the top plate moving mechanism unit 220 is operated to change from the third state to the second state, and in this second state, the gantry position adjusting mechanism unit 150 is operated to set the gantry unit 104 to a predetermined state. Next, the inspection unit moving mechanism unit 230 is operated from the second state to return the inspection unit 100 to the predetermined home position to the first state, and the top plate is moved up and down. The mechanism 240 can be set to operate and return to the return position. In addition, the moving mechanism units can be simultaneously driven or set in a different order. In addition, the third
It is also possible to set so as to return from the state to the first state. These settings can be input from the data collection and analysis apparatus 400.

When the test engineer confirms that the subject has stepped off the bed unit 200 at the return position and operates the return switch 253 again, the control unit 270 operates the top plate lifting mechanism unit 240. To return to the first state.

As described above, the cardiac magnetic field measurement device according to this embodiment can provide an operation that can be easily measured by a laboratory technician by operating the plurality of mechanism units using the operation unit 250.
(Second embodiment)
Next, an embodiment according to the present invention will be described with reference to FIGS. 13 is an external view of the cardiac magnetic measurement device in use, FIG. 14 is an external perspective view of the bed, FIG. 15 is an external view of the bed, FIG. 16 is an external view of the magnetic shield room, and FIG. It is explanatory drawing shown. In addition, the same structure and site | part are shown with the same code | symbol, and the overlapping description is abbreviate | omitted.

First, with reference to FIG. 13, a schematic structure of a cardiac magnetic measurement apparatus according to the second embodiment will be described. FIG. 13 shows the bed unit 200, the magnetic shield room 300, and the bed table 500 in the first state. The data collection and analysis device 40
0 and the magnetic field measurement drive device 500 are omitted because they are used in the same function and arrangement as in the first embodiment.

The cardiac magnetic measurement device of this embodiment has the same basic structure and arrangement as the cardiac magnetic measurement device of the first embodiment, but has a structure corresponding to a low price.

One of the features is that the top plate lifting mechanism 240 is stopped and the top plate 210 is fixed in height. In this embodiment, the top plate 21 with the fixed height.
In order to improve the ease of getting to 0, the mounting table 500 is used. This mounting table 500
Is provided with a floor surface 501 that is one step higher on one side (M direction side) of the bed portion 200 in the Y direction,
On one side (N direction side) in the Y direction, a flow surface 502 having the same height as the floor surface on which the bed portion 200 is installed is provided.

According to the mounting table 500, the subject can go up from the normal floor surface to the floor surface that is one step higher, and sit on the top plate 210 from the floor surface 501 and lie down. On the other hand, the laboratory technician can perform care and operation for the subject on the same floor surface as the installation surface of the bed part 200. Therefore, the test subject needs to go up to the floor surface 501 once, but can obtain the same effect as the top plate elevating mechanism 240. On the other hand, since the height of the inspection engineer is the same as the installation position of the bed part 200, the same effect as the first embodiment can be obtained.

In this embodiment, the mounting table 500 is formed in a circular shape centered on the mark 218 when viewed from above. Accordingly, the subject can go up to the floor surface 501 from any direction as long as the subject is in the M direction. And according to this circular shape, the test subject can expect the effect induced toward the mark 218 which is the center of the circle.

Another feature of this embodiment is that the gantry includes the top plate moving mechanism 220, the inspection unit moving mechanism 230, the Z direction adjusting mechanism 151, and the Y direction adjusting mechanism 152. The position adjustment mechanism 150 is manually operated. This manual structure can greatly reduce the cost.

Another feature of this embodiment is that the outer shape of the magnetic shield room 300 is made compact by stopping the top plate lifting mechanism 240. In this embodiment, a small and compact appearance image can be greatly impressed by the round appearance of the track having a round cross section.

Hereinafter, the cardiac magnetic measurement apparatus of the second embodiment will be described in more detail with reference to FIGS.

First, the external structure of the bed portion will be described with reference to FIGS. FIG.
FIG. 3 is a perspective view of a bed portion. FIG. 15 is an external view of the bed, (a) a plan view, (b)
) Is a front view, (c) is a left side view, and (d) is a right side view. FIG. 17 is an explanatory diagram of the moving mechanism unit.

14 and 15, in this embodiment, the bed portion 200 includes a base portion 201 installed on the floor surface and the top plate provided on the upper portion of the base portion 201 so as to be slidable in the X direction. 210 and the inspection unit 100 disposed on one end side of the top plate 210 in the longitudinal direction. The base portion 201 includes a leg portion 202 installed on the floor, a top plate support portion 203 that supports the top plate 210, and a support column portion that connects the leg portion 202 and the top plate support portion 203. 2
06.

As shown in FIG. 17, a top plate moving mechanism unit 220 including a pair of support rails 205 provided in the X direction is provided on the top surface of the top plate support unit 203 to move the top plate 210 in the X direction. Can be made.

Returning to FIG. 14 and FIG. 15, the support column portion 206 includes the top plate support portion 203 and the leg portion 20.
It is formed slightly smaller than 2, and has a wide lower limb space. In addition, since the height of the leg portion 202 is set to the same height as the floor surface 501 of the mounting table 500, an impression that the top board 210 is lifted from the viewpoint of the subject is held, Impressing the size further.

The top plate 210 has the same structure as that of the first embodiment, that is, a frame member 212, a bed portion 211, and an inspection unit support rail 213. A slide rail that constitutes the top plate moving mechanism 220 together with the slide rail of the top plate support 203 is provided on the lower surface of the frame member 212 and is attached to be movable in the X direction.

In addition, a locking groove (not shown) divided into a plurality of portions in the X direction is provided at a predetermined interval on one side of the inspection unit support rail 213 so that the movement of the inspection unit 100 in the X direction can be locked at a predetermined interval. Yes.

Further, a handle 216 is provided on one side of the top plate 210, and this handle 2
The inspection section 210 is provided on the other end side in the X direction facing 16. In this embodiment,
Since the top plate moving mechanism 220 is manually operated, the top plate 2 is used by using the handle 216.
10 is moved in the X direction. The handle 216 is provided with a lock button (not shown), and the movement of the top plate 210 is fixed in two places, a first state shown in FIG. 14 and a third state shown in FIG. be able to.

The inspection unit 100 is formed in an arc shape when viewed from the X direction. And X
When viewed from the direction, the upper semicircular portion is formed in a flat plate shape, and the opening 1 that penetrates the lower portion in the X direction
09. In the semicircular portion, a gantry unit 104 having the cooling container 101 is provided.
Is movably supported by the manual gantry position adjustment mechanism 150.

In this embodiment, since the size of the upper end of the cooling container 101 is made smaller than the lateral width of the inspection unit 100, the upper external shape of the inspection unit 100 can be an arc.

On one side plate of the inspection unit 100, a Y-direction rotating lever 153 for operating the manual Y-direction adjusting mechanism 152 and a Z-direction rotating lever 15 for operating the manual Z-direction adjusting mechanism 151 are provided.
4 is provided.

This structure will be described in more detail with reference to FIG. The gantry unit 104 is supported by a plurality of screw rods 170 provided on the inspection unit main body 105. This threaded rod 170
The longitudinal direction is arranged in the Z direction, and a trapezoidal gear 171 is provided at the lower end thereof. The Z-direction rotation lever 154 is provided with a trapezoidal gear connected to the gear 171.
By rotating the rotation lever 154 in the Z direction, the rotational force is transmitted to the gear 171 and the screw rod 170 can be rotated. The gantry unit 104 includes
A screw that meshes with the threaded rod 170 is provided, and the gantry unit 104 can be moved up and down by the rotation of the threaded rod 170.

On the other hand, the gantry section 104 has a threaded rod 18 whose longitudinal direction is arranged in the Y direction.
0 is provided. The rotating lever 153 in the Y direction is provided on one end side of the threaded rod 180, and the cooling container 101 having a screw that meshes with the threaded rod 180 is disposed. Accordingly, by rotating the rotation lever 153, the cooling container 10 is rotated.
1 can be moved in the Y direction.

In this embodiment, as the gantry unit 104 is raised and lowered, the Y-direction rotary lever 153 is also raised and lowered, so that the rotary lever 153 is operated through a window that is long in the Z direction.

Furthermore, a handle support bar 155 extending along the inspection unit support rail 213 is provided on one side plate of the inspection unit 100. The handle support bar 155 is connected to the inspection unit 100.
Is moved on the inspection section support rail 213, and an arched handle 156 is provided at the end thereof. The inspection engineer can move the inspection unit 100 in the X direction by holding the arched handle 156 and moving it in the X direction.

The handle 156 is provided on one side of the mark 218 in the first state of FIG. Therefore, in the first state, the handle 156 is located in the vicinity of the mark 218, and can therefore be used as a handrail when the subject lies down. On the other hand, the laboratory technician can move from the first state to the second state by holding the handle 156.

And in the said 2nd state shown with the dotted line of FIG.
Since it moves to the end of 0, the positioning operation of the gantry position adjusting mechanism 150 is not hindered. In addition, since the handle 156 is positioned in the vicinity of the handle 216 provided on the top plate 210 in the second state, the handle 156 also functions as a handle for moving to the third state. Can do.

In this embodiment, the rail holding portions 111 are provided at both lower ends of the inspection portion 100 so that the inspection portion support rails 213 are sandwiched from both sides. This prevents the inspection unit 100 from coming off the inspection unit support rail 213.

Further, a lock switch 157 is provided below the arch-shaped handle 156. The lock switch 157 can be fitted into the lock groove formed in the inspection unit support rail 213 to fix the inspection unit 100 at a predetermined position.

Next, with reference to FIG. 16, the external structure of the magnetic shield room 300 will be described. 16A and 16B are external views of the magnetic shield room, where FIG. 16A is a perspective view, FIG. 16B is a longitudinal sectional view, FIG. 16C is a left side view, FIG. 16D is a front view, and FIG. Is a cross-sectional view, and FIG.

The magnetic shield room 300 according to the second embodiment is the same as that of the first embodiment,
(C) The point that the external shape seen from the X direction shown in the figure is a track shape is greatly different, and other parts have the same structure as the first embodiment.

In this embodiment, since the top plate 210 of the bed portion 200 is not raised or lowered, the width W5 of the upper surface of the pedestal portion 302 that supports the width W0 of the top plate 210 is set to the pedestal portion 302.
There is no need to provide a lower position. For this reason, in this embodiment, the pedestal 30
The shape of the opening 301 below the upper surface of 2 is formed in an arc shape. Similarly, the upper part of the opening 301 has an arc shape corresponding to the upper shape of the inspection part 100 because it is an arc shape. Therefore, in this embodiment, since the cylindrical opening 301 has a track shape, the magnetic shield room 300 inevitably has a cylindrical shape with a track-shaped cross section. The other parts are the same as those in the first embodiment, and a description thereof will be omitted.

As described above, the cardiac magnetic field measurement apparatus according to the second embodiment can move various movement mechanisms by manual operation, and can therefore reduce the manufacturing cost. In particular, since the top plate lifting mechanism 240 is manually operated, the magnetic shield room 300 can be made compact, so that further downsizing can be realized.

In the second embodiment, only the top plate lifting mechanism 240 may be manually operated, and the other moving mechanism may have an automated structure as in the first embodiment. According to this structure, automation can be promoted with a compact appearance, and labor of the inspection engineer can be reduced.

1 is an external view of an apparatus according to a first embodiment. It is a measurement principle figure of a 1st example. It is a component block diagram of 1st Example. It is a component block diagram of 1st Example. 1 is an external view of an apparatus according to a first embodiment. 1 is an external view of an apparatus according to a first embodiment. 1 is an external view of an apparatus according to a first embodiment. 1 is an external view of an apparatus according to a first embodiment. 1 is an external view of an apparatus according to a first embodiment. It is an operation | movement control apparatus figure of 1st Example. It is operation | movement explanatory drawing of 1st Example. It is operation | movement explanatory drawing of 1st Example. It is an external view of the use condition of 2nd Example. It is an external appearance perspective view of the bed part of 2nd Example. It is an external view of the bed part of 2nd Example. The magnetic shield room of 2nd Example is an external view. It is explanatory drawing which shows the moving mechanism of 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Inspection part, 101 ... Cooling container, 102 ... Sensor, 103 ... 1st reference sensor, 1
04 ... Gantry part, 105 ... Inspection part body, 106 ... Projection part, 107 ... Connecting rod, 108 ...
Opening and closing lid, 109 ... opening, 150 ... gantry position adjustment mechanism, 151 ... Z direction adjustment mechanism, 152 ... Y direction adjustment mechanism, 153 ... Y direction rotation lever, 154 ... Z direction rotation lever, 155 ... handle Support bar, 156 ... handle, 157 ... lock switch, 160 ... signal line, 200 ... bed part, 201 ... base part, 202 ... leg part, 203 ... top plate support part, 204
DESCRIPTION OF SYMBOLS ... Cover, 205 ... Support rail, 210 ... Top plate, 211 ... Bed part, 212 ... Frame member, 213 ... Inspection part support rail, 214 ... Support groove, 215 ... First emergency stop button, 216
... handle, 217 ... second emergency stop button, 218 ... mark, 220 ... top plate moving mechanism part (first moving mechanism part), 221 ... cylinder, 222 ... intermediate member, 230 ... inspection part moving mechanism part (first 2 movement mechanism section), 240 ... top plate lifting mechanism section, 250 ... operation section, 251 ... up / down switch, 252 ... movement switch, 253 ... movement switch, 253 ... return switch,
260 ... adjustment switch group, 261 ... lock switch, 262 ... elevating switch, 263, ...
Movement switch, 270 ... control section, 271 ... storage section, 272 ... position sensor, 300 ... magnetic shield room, 301 ... cylindrical opening, 302 ... pedestal section, 303 ... holder, 310 ... top plate support means, 320 Shield room body, 321 ... exterior body, 322 ... interior body, 323 ... adjustment member, 324 ... makeup cover, 350 ... leg, 400 ... data collection and analysis device, 500 ... magnetic field measurement drive device, P ... central axis, Q ... measurement surface.

Claims (14)

A base unit fixed to the floor, a top plate for placing the subject, an inspection unit having a plurality of magnetometers, and a top plate moving mechanism for moving the top plate in the longitudinal direction with respect to the base unit And an inspection part moving mechanism for moving the inspection part in the longitudinal direction with respect to the top plate,
A first state in which the inspection unit is retracted to one side in the longitudinal direction of the top plate;
The inspection section is moved in the longitudinal direction from the first state and fixed in a predetermined position.
The state of
The living body characterized in that a third state can be taken in which the top plate is moved and fixed at a predetermined position while maintaining the positional relationship between the top plate and the inspection unit from the second state. Magnetic field measuring device. The top plate includes a pair of inspection unit support rails that support the inspection unit on both sides in the short direction,
The said test | inspection part is equipped with a pair of side plate supported by the said test | inspection support rail, and the opening part which lets a test subject pass through the said movement between the said pair of side plates. Biomagnetic field measurement device. The biomagnetic field measurement apparatus according to claim 2, wherein the inspection unit includes a magnetometer position adjustment mechanism that adjusts positions of a plurality of magnetometers. The position magnetometer position adjusting mechanism includes a driving unit that drives the height direction of the magnetometer, a control unit that controls the driving unit, and a detection unit that detects the position of the magnetometer in the height direction,
The inspection unit moving mechanism unit includes an inspection unit fixing means for fixing the movement of the inspection unit,
The first detection position and the second detection The control means fixes the inspection unit fixing means at the first detection position, and controls the drive means at a second detection position lower than the first detection position. The biomagnetic field measurement apparatus according to claim 3, wherein the biomagnetic field measurement apparatus is stopped. A cylindrical magnetic shield room having an opening that coincides with the longitudinal axis of the top plate in the central axis thereof,
In the first state, the magnetic shield room side is the retreat position of the inspection unit,
The biomagnetic field measurement apparatus according to any one of claims 1 to 4, wherein the predetermined position in the third state is in the magnetic shield room. The retreat position of the inspection unit in the first state is in the magnetic shield room,
The biomagnetic field measurement apparatus according to claim 5, further comprising support means for supporting one end of the top plate in the third state in the cylindrical opening. The base unit includes a top plate lifting mechanism for lifting the top plate,
The biomagnetic field measurement apparatus according to claim 6, wherein, in the first state, the cylindrical opening has a size that allows the top plate lifting mechanism to operate. A bed portion having a top plate for placing the subject on the upper surface, and a cylindrical magnetic shield room installed on the floor surface in a predetermined positional relationship with the bed portion,
The bed unit includes an inspection unit moving mechanism unit that moves an inspection unit provided on one end side in the longitudinal direction of the top plate to the center side along the longitudinal direction, and the inspection unit moved to the center side. And a top plate moving mechanism for moving the magnetic shield room into the magnetic shield room. A bed portion having a top plate for placing the subject on the upper surface, and a cylindrical magnetic shield room having a central axis that coincides with the longitudinal extension of the top plate,
The bed portion includes a top plate that moves in the longitudinal direction via a first moving mechanism, and an inspection portion that moves to the top plate in the longitudinal direction via a second moving mechanism,
A first state in which the inspection unit is retracted to the magnetic shield room side in the longitudinal direction of the top plate;
A second state in which the inspection unit is moved from the first state to the inspection position;
A biomagnetic field measurement apparatus characterized in that it can take a third state stored in a predetermined position in the magnetic shield room while maintaining a positional relationship between the top plate and the inspection unit in the second state. A bed portion having a top plate for placing the subject on the upper surface, and a cylindrical magnetic shield room having a central axis that coincides with the longitudinal extension of the top plate,
The bed portion includes a top plate that moves in the longitudinal direction via a first moving mechanism, and an inspection portion that moves to the top plate in the longitudinal direction via a second moving mechanism,
A first state in which the inspection unit located on one end side in the longitudinal direction of the top plate is housed in the magnetic shield room;
A second state in which the inspection unit is moved out of the magnetic shield room from the first state;
A biomagnetic field measurement apparatus characterized in that it can take a third state stored in a predetermined position in the magnetic shield room while maintaining a positional relationship between the top plate and the inspection unit in the second state. The top plate includes a pair of inspection unit support rails that support the inspection unit on both sides in the short direction,
The said test | inspection part is equipped with a pair of side plate supported by the said test | inspection support rail, and the opening part which lets a test subject pass through the said movement between the said pair of side plates. Any one of the biomagnetic field measuring devices of description. The biomagnetic field measurement apparatus according to claim 11, wherein the inspection unit includes a magnetometer position adjustment mechanism that adjusts positions of a plurality of magnetometers. The position magnetometer position adjusting mechanism includes a driving unit that drives the height direction of the magnetometer, a control unit that controls the driving unit, and a detection unit that detects the position of the magnetometer in the height direction,
The inspection unit moving mechanism unit includes an inspection unit fixing means for fixing the movement of the inspection unit,
The first detection position and the second detection The control means fixes the inspection unit fixing means at the first detection position, and controls the drive means at a second detection position lower than the first detection position. The biomagnetic field measurement apparatus according to claim 12, wherein the biomagnetic field measurement apparatus is stopped. The base unit includes a top plate lifting mechanism for lifting the top plate,
The biomagnetic field measurement apparatus according to claim 11, wherein, in the first state, the cylindrical opening has a size that allows the top plate lifting mechanism to operate.

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