JPH08126627A - Medical diagnostic apparatus - Google Patents

Abstract

PURPOSE: To provide a medical diagnostic apparatus easily to handle when an electronic imaging device and a magnetic resonance diagnostic device are used together and to perform excellent diagnosis reduced in the generation of image noise or trouble by preventing the electromagnetical radio wave interference between the electronic imaging device and the magnetic resonance diagnostic device. CONSTITUTION: The respective constitutional parts of a CCD camera 9 used in the magnetic field environment within the imaging range of an MRI apparatus 2 in combination with the MRI apparatus 2 are made of a non-magnetic material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical diagnostic apparatus that uses an electronic imaging device such as a CCD and a magnetic resonance diagnostic device together.

[0002]

2. Description of the Related Art In general, a magnetic resonance diagnostic (hereinafter referred to as MRI) apparatus has become widespread in a medical field as a diagnostic apparatus capable of obtaining a tomographic image of a living body along with an X-ray CT apparatus and an ultrasonic diagnostic apparatus. . The principle of this MRI apparatus is that a high-frequency magnetic field is applied to an object to be imaged placed in a static magnetic field, and a resonance signal generated from the object to be imaged is captured by a high-frequency antenna to reconstruct an image.

Here, the magnetic field in the imaging range of the MRI apparatus is
An extremely strong magnetic field is required. On the other hand, in order to obtain an MRI image free from distortion and noise, the magnetic field in the imaging range must be distributed with an extremely uniform magnetic force in principle.

Further, since the resonance signal obtained from the object to be imaged is extremely weak, it is necessary for the antenna for receiving the resonance signal not to receive noise radio waves generated from peripheral equipment or the like. For these reasons, conventionally, most MRI apparatuses have been used alone in a dedicated room that is electromagnetically isolated, and are rarely used together with other equipment.

However, with the progress of medical technology, diagnosis and
The use of multiple devices at the same time is required for more accurate treatment. The MRI apparatus is no exception, and it is desired to be used together with other diagnostic apparatuses and therapeutic apparatuses. For example, Japanese Patent Publication No. 3-517
As described in Japanese Patent No. 4 publication, MR diagnosis in a body cavity in which an antenna for MR imaging is incorporated in an optical fiber endoscope, that is, MR
Endoscopic research is being conducted.

The advantage of the MR endoscope is that the MRI signal can be received inside the patient's body, so that M
The point is that an image inside the body can be obtained with a higher SN ratio and resolution compared to a general MRI apparatus that receives an RI signal. Therefore, in the MR endoscope, how to reduce noise generated from peripheral devices is an important technical issue.

Further, an image from an endoscope using an optical fiber is mostly affected by a strong electromagnetic wave generated from an MR device because an image of a subject is handled only by an optical lens and an optical system element such as an optical fiber. Absent.

On the contrary, since the electromagnetic wave generated from the optical fiber endoscope is weak, it hardly affects the MR device. In other words, since there is little electromagnetic interference between the endoscope and the MR device, the optical fiber endoscope is
It is relatively easy to realize an MR endoscope incorporating an antenna.

[0009]

When the MRI apparatus is used in combination with the optical fiber having few elements for electrically generating noise as in the above-mentioned conventional structure, the adverse effect of electromagnetic interference between the two is not a serious problem. As a device used together with the MRI apparatus, it is highly possible that an electronic image pickup device such as a television camera using a CCD will be used as an auxiliary monitor in the future.

As is well known, the CCD camera handles pulses such as clocks, horizontal synchronizing signals, and vertical synchronizing signals corresponding to the pixels of the CCD, so that electrical noise is generated. Also, since the video signal handled by the CCD camera is weak, it is important that it is not affected by electromagnetic waves from the outside.

Therefore, when the CCD camera and the MRI apparatus are used together, the MRI apparatus is protected so as not to be affected by noise generated from the CCD camera, and conversely MR
It is necessary to prevent the strong magnetic field of the I device from adversely affecting the CCD camera.

However, the conventional CCD camera is used as it is for M
When used in a strong magnetic field environment of an RI apparatus, not only is a magnetic material such as iron, which is generally used as a component of a CCD camera, pulled by a magnetic field, but also magnetic distortion of space due to the presence of the magnetic material. In addition, there is a possibility that electromagnetic wave interference between the CCD camera and the MRI apparatus may be further aggravated by the effect of eddy current generated in the magnetic body.

The present invention has been made in view of the above circumstances, and its object is to easily handle the electronic image pickup apparatus and the magnetic resonance diagnostic apparatus when used together, and to make the magnetic resonance diagnostics the constituent parts of the electronic image pickup apparatus. It is possible to prevent the device from being pulled by the magnetic field of the device, and to suppress the electromagnetic distortion between the electronic imaging device and the magnetic resonance diagnostic device due to the magnetic distortion of the space due to the presence of the magnetic substance and the influence of the eddy current generated in the magnetic substance. It is an object of the present invention to provide a medical diagnostic apparatus capable of preventing a specific radio wave interference and performing an excellent diagnosis with less image noise or failure.

[0014]

According to the present invention, each component of an electronic image pickup device used in a magnetic field environment within the imaging range of the magnetic resonance diagnostic device in combination with the magnetic resonance diagnostic device is made of a non-magnetic material. It is a thing.

[0015]

By configuring each component of the electronic image pickup device with a non-magnetic material, the electronic image pickup device main body is prevented from being pulled by the magnetic force of the magnetic resonance diagnostic device, and the magnetic force of the magnetic resonance diagnostic device prevents the electronic image pickup device from being pulled. The components are prevented from being destroyed, the magnetic force of the magnetic resonance diagnostic apparatus is prevented from affecting the image quality of the electronic imaging apparatus, and the magnetic strain of the magnetic resonance diagnostic apparatus by the electronic imaging apparatus is reduced. is there.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will now be described with reference to FIG.
This will be described with reference to (B). FIG. 1A shows a schematic configuration of the medical diagnostic apparatus 1 as a whole, and reference numeral 2 denotes a C-arm MRI apparatus (magnetic resonance diagnostic apparatus).

In this MRI apparatus 2, a base 3 is provided with a substantially inverted L-shaped support arm 4 projecting therefrom. The magnetic field generator 5 of the MRI apparatus 2 is provided with a pair of magnets 6 and 7. Here, one magnet 6 is disposed on one side of the base 3, and the other magnet 7 is the magnet 6.
Is fixed to the tip end portion of the support arm 4 in a state of being separated and opposed to above. And the upper and lower magnets 6,7
A space for installing the imaged body 8 is arranged between them.

In this medical diagnostic apparatus 1, a CCD camera (electronic image pickup device) 9 is used in combination with the MRI device 2 in a magnetic field environment within the image pickup range of the MRI device 2.
As shown in FIG. 1B, the CCD camera 9 is provided with an optical lens 11 serving as an objective lens inside a camera outer cylinder 10, and a CCD chip 12 and a CCD circuit board 13 are arranged behind the optical lens 11. It is set up. The CCD circuit board 13 is connected to one end of a coaxial cable 14 for transmitting and receiving signals from the CCD chip 12. The other end of the coaxial cable 14 is connected to the signal processing circuit of the external CCD camera 9. The image taken by the CCD camera 9 is displayed on an external display device such as a monitor via the signal processing circuit.

A camera outer cylinder 10, an optical lens 11, a CCD chip 12, and a CC which constitute the CCD camera 9
All the components such as the D circuit board 13 and the coaxial cable 14 are made of a non-magnetic material such as plastic, glass, copper or aluminum. In addition, CCD chip 12 and CC
The periphery of the CCD unit 15 including the D circuit board 13 is covered with a substantially box-shaped non-magnetic electromagnetic shield plate 16 having an opening on the front surface (the surface facing the optical lens 11).

The components of the CCD camera 9 are specifically made of the following materials. That is, the camera outer cylinder 10 is made of copper, aluminum, synthetic resin,
It is a metal-deposited resin. The optical lens 11 is glass or synthetic resin. The CCD chip 12 is a conductor such as gold and a semiconductor such as silicon. The CCD circuit board 13 is glass epoxy, Teflon, a polymer film, or the like. The coaxial cable 14 is an insulator made of a non-magnetic metal such as gold, silver, copper or aluminum and a polymer material. Electromagnetic shield 16
Is a plate, wire mesh, thin film or the like made of a non-magnetic metal such as gold, silver, copper or aluminum. Here, the front surface of the CCD chip 12 may be shielded by a metal net through which light passes from the optical lens 11 to the CCD chip 12, or a light receiving element of the CCD chip 12 may be shielded by a lattice-shaped thin film deposited on the light receiving surface. .

Therefore, the following effects can be obtained with the above configuration. That is, since the CCD camera 9 made of a non-magnetic material is provided, when the CCD camera 9 is brought into the magnetic field of the MRI apparatus 2 (the arrow line in FIG. 1A), the magnetic field of the MRI apparatus 2 is changed. There is no possibility that the main body of the CCD camera 9 will be pulled by the magnetic force of the MRI apparatus 2 as in the case of using an ordinary CCD camera (including components made of magnetic material such as iron and nickel). Therefore, it is easier to handle the CCD camera 9 than when a normal CCD camera is used in the magnetic field of the MRI apparatus 2.

Furthermore, each component of the CCD camera 9 is not destroyed by the magnetic force of the MRI apparatus 2 and there are few failures, and the image quality of the image taken by the CCD camera 9 is deteriorated due to the influence of the magnetic force of the MRI apparatus 2. There is no fear of doing it.

Further, since the electromagnetic shield 15 can prevent the electric noise generated from the CCD camera 9 from leaking to the outside, the magnetic distortion due to the presence of the CCD camera 9 in the magnetic field of the MRI apparatus 2 is prevented. Can be reduced. Therefore, it is possible to prevent the electromagnetic distortion between the CCD camera 9 and the MRI apparatus 2 due to the magnetic distortion of the magnetic field space of the MRI apparatus 2 due to the presence of the magnetic material and the influence of the eddy current generated in the magnetic material. Therefore, it is possible to prevent the image noise of the MRI apparatus 2 from occurring.

Furthermore, since the CCD camera 9 can be used in combination with the MRI apparatus 2 in a magnetic field environment within the imaging range of the MRI apparatus 2, for example, during operation of a patient on the observation table of the MRI apparatus 2. In addition, it becomes possible to observe the tomographic image with the MRI apparatus 2 while observing the image of the surface of the organ of the patient with the CCD camera 9, which enables more excellent diagnosis and treatment.

In the MRI apparatus 2 of this embodiment, the upper and lower magnets 6 and 7 of the magnetic field generator 5 are supported by the substantially C-shaped arm (base 3 and support arm 4). The space for installing the imaged object 8 between the magnets 6 and 7 is open. For this reason, the MRI apparatus 2 has a structure in which it is easier to observe and treat the imaged object 8 as compared with a cylindrical system that is often used in the magnetic field generation apparatus 5 of the MRI apparatus 2 of this type. It becomes possible to perform surgery while observing.

2A and 2B show the second embodiment of the present invention.
FIG. This is a device in which a CCD camera 24 made of a non-magnetic material and a high-frequency loop antenna 26 for MRI imaging of an MRI device 25 are incorporated in a distal end portion 23 of an insertion portion 22 of a flexible electronic endoscope 21.

Here, the CCD camera 24 is shown in FIG.
As shown in FIG. 3, a CCD unit including an optical lens 27 arranged in front of the tip end portion 23 of the insertion portion 22, a CCD chip 28 and a CCD circuit board 29, which are arranged to face each other behind the lens 27 with a space therebetween. And 30 are provided.
Further, the periphery of the CCD unit 30 is covered with a substantially box-shaped non-magnetic electromagnetic shield plate 31 having a front surface (a surface facing the optical lens 27) opened.

The loop antenna 26 is arranged in front of the optical lens 11 with respect to the observation direction of the CCD camera 24. A CCD unit 30 electromagnetically shielded by an electromagnetic shielding plate 31 is installed behind the loop antenna 26 at a slight distance so that the loop antenna 26 and the CCD unit 30 avoid electromagnetic interference with each other. It has become.

Further, one end of a coaxial cable 32 is connected to the CCD circuit board 29. This coaxial cable 3
The other end of 2 is a signal processing device 3 that also serves as a light source of the endoscope 21 disposed outside the endoscope 21 as shown in FIG.
Connected to 3. The signal processing device 33 is connected to a display device 34 such as an external monitor and an MRI device 25. The image captured by the CCD camera 24 is displayed on the display device 34 via the signal processing device 33.

Further, the loop antenna 26 is connected to the MRI apparatus 25 via an MR signal cable (coaxial cable) 35. Then, the MR signal received by the loop antenna 26 is transmitted to the M signal via the MR signal cable 35.
It is sent to the RI device 25 and a tomographic image is formed.

Therefore, the following effects can be obtained with the above configuration. That is, since the CCD unit 30 of the CCD camera 24 is electromagnetically shielded by the electromagnetic shield plate 31 and the influence of the strong magnetic field of the MRI apparatus 25 can be mitigated, the CCD unit 30 can reduce the influence of the strong magnetic field of the MRI apparatus 25. It will not be damaged when received and its performance will not deteriorate.

Further, the electromagnetic shield plate 31 of the CCD unit 30 is a non-magnetic material and has little effect of magnetically distorting the magnetic field space of the MRI apparatus 25, so that the performance of the MRI apparatus 25 is not deteriorated.

Further, since the endoscope 21 can be used in combination with the MRI apparatus 25, for example, the mucosal surface of the stomach is observed by the CCD camera 24 and at the same time, the submucosal slice observed by the CCD camera 24 is observed. MRI device 2
5 loop antennas 26 can be obtained. At this time, the video signal captured by the CCD camera 24 is MR
The signal processing device 3 together with the video signal captured by the I device 25
After being recorded in the memory inside 3, the two images can be compared after being subjected to image processing that is optimal for diagnosis, improving diagnostic techniques such as early detection of cancer and knowing the depth of invasion. To help.

Further, the directivity of the loop antenna 26 arranged at the distal end portion 23 of the insertion portion 22 of the endoscope 21,
Since the directivity of the optical system of the CCD camera 24 is the same direction, the image of the mucous membrane surface observed by the CCD camera 24 and the MR
Since the correspondence with the tomographic image of the I-device 25 is easy, diagnosis is easy.

Further, since the loop antenna 26 is arranged in front of the CCD unit 30 of the CCD camera 24, the CCD chip 28 of the CCD unit 30 and the CC
As in the case where the D circuit board 29 and the loop antenna 26 are arranged in front of the loop antenna 26, the weak MR signal emitted from the living body is CCed.
It is possible to prevent the D unit 30 from blocking and making it difficult for the loop antenna 26 to receive the signal.

The CCD camera 24 of the electronic endoscope 21
Driving signals are transmitted and received between the CCD circuit board 29 and the MRI apparatus 25, and the driving timings of them can be controlled.

Next, referring to FIG. 3A, the electronic endoscope 2 will be described.
The drive timing of the CCD camera 24 and the MRI apparatus 25 of No. 1 will be described. Here, as shown in FIG. 3A, the MRI apparatus 25 is driven to stop the driving of the CCD camera 24 in the first state, and the MRI apparatus 25 is stopped to drive to drive the CCD camera 24 in the second state. By alternately switching the states 1 and 2, the mutual electromagnetic interference is reduced. In FIG. 3 (A), the time axis is set in the horizontal direction, and the driving timings of the CCD camera 24 and the MRI apparatus 25 are shown.

In this way, the period during which the driving of the CCD camera 24 is stopped (the time when OFF is displayed in FIG. 3A)
First, the MRI apparatus 25 is imaged (when ON is displayed in FIG. 3A), and conversely, the CCD camera 24 is imaged while the MRI apparatus 25 is stopped.

Therefore, in the above structure, the CCD
The period during which the camera 24 is electrically scanning for imaging is M
Since the electrical scanning of the RI device 25 is stopped, the MRI
It is possible to prevent the adverse effect of the high-frequency magnetic field generated from the device 25 entering the CCD camera 24 as noise. On the contrary, during the imaging period of the MRI apparatus 25,
The electrical scanning of the CCD camera 24 can be stopped to prevent noise from entering the MRI apparatus 25. Therefore, as described above, the CCD camera 24 and the MRI apparatus 25 are
By alternately driving, while one of the CCD camera 24 and the MRI apparatus 25 is performing an operation for capturing an image, electromagnetic waves are not generated from the other, so that noise or an image is generated in the image due to electromagnetic interference between the two. No distortion or the like occurs, and mutual devices can be protected from failure due to electromagnetic interference.

Further, as shown in FIG. 3B, the image data captured at the time A immediately before the CCD camera 24 stops the image pickup is in the same period during the CCD camera 24 being stopped between the time B and the time C. In addition, the display device 34 such as a monitor may be continuously reproduced. In this case, it is possible to prevent the image displayed on the display device 34 such as a monitor from being interrupted while the CCD camera 24 is stopped and the image sent from the CCD camera 24 being not interrupted. Therefore, CCD
Even during the period in which the camera 24 is stopped, the stored data of the image captured immediately before that is continuously displayed as an image on the display device 34 such as a monitor.
Since it can be reproduced, the image is not interrupted during the stop period of the CCD camera 24, and the diagnosis is easy.

FIG. 4 shows a third embodiment of the present invention. This is one in which a CCD camera 44 made of a non-magnetic material and a high-frequency loop antenna 26 for MRI imaging of the MRI apparatus 25 shown in FIG. .

Here, as shown in FIG. 4, in the CCD camera 44, a first optical system 45 is provided in front of the tip end portion 43 of the insertion portion 42 of the rigid endoscope 41, and the first optical system 45. CCD chip 46 that is arranged far away from and behind 45
And a CCD circuit board 47, and a second optical system 49 provided between the CCD unit 48 and the first optical system 45. The first optical system 45 and the second optical system 49 are formed by, for example, an optical fiber or a relay lens. Further, the periphery of the CCD unit 48 is covered with a substantially box-shaped non-magnetic electromagnetic shield plate 50 having a front surface (a surface facing the second optical system 49) opened.

Further, in the present embodiment, the loop antenna 26 is arranged in front of the second optical system 49 with respect to the observation direction by the CCD camera 44 as in the second embodiment. A CCD unit 48 electromagnetically shielded by an electromagnetic shielding plate 50 is installed far behind the loop antenna 26 so that the loop antenna 26 and the CCD camera 44 avoid electromagnetic interference with each other. There is.

Therefore, with the above-described structure, the same effect as that of the second embodiment can be obtained, and in this embodiment, the CCD is particularly connected via the first optical system 45 and the second optical system 49.
Since the light is guided to the unit 48, the distance between the CCD unit 48 and the loop antenna 26 can be freely set by the combination of the optical axes of the first optical system 45 and the second optical system 49. be able to. for that reason,
By increasing the light guiding distance to the CCD unit 48 by using the second optical system 49, the distance between the CCD unit 48 and the loop antenna 26 can be set far apart, so that the CCD unit 48 and Loop antenna 2
It is possible to effectively prevent mutual electric interference between the first and second electrodes.

FIG. 5 shows a fourth embodiment of the present invention. In this case, the CCD camera 9 made of the non-magnetic material shown in the first embodiment is installed as an external camera on the eyepiece portion 52 of the rigid endoscope 51 made of the non-magnetic material.

Further, in this embodiment, the MR diagnostic loop antenna 54 is inserted into the body cavity through the channel 53 of the rigid endoscope 51. The surface of the loop antenna 54 is insulated so as to improve the electrical safety of the living body when it is in close contact with the affected area.

Here, the material of the loop antenna 54 may be copper, aluminum, or a shape memory alloy such as an alloy of nickel and titanium. When the material of the loop antenna 54 is a shape memory alloy, the loop of the loop antenna 54 is closed to form an elongated wire-like shape for the channel 5.
After inserting 3, the loop antenna 5
It is convenient because the shape of 4 can be restored to a loop shape.

The signal of the loop antenna 54 can be transmitted or received with the main body of the MRI apparatus 25 shown in FIG. 2 (A) via the coaxial cable 55. Here, the coaxial cable 55 also serves as a support for the loop antenna 54, and by moving the coaxial cable 55 forward and backward, the distance between the affected part and the loop antenna 54 is adjusted, and the imaging range of the MRI apparatus 25 and the sensitivity. Can be adjusted.

Therefore, in the above-mentioned structure, the loop antenna 54 and the CCD camera 9 can be installed at a large distance, so that mutual electromagnetic interference can be reliably reduced. Therefore, it is possible to obtain images of the MRI apparatus 25 and the CCD camera 9 with less noise and distortion, which enables more excellent diagnosis.

FIG. 6 shows a fifth embodiment of the present invention. This is because the distal end portion of the flexible endoscope 61 is connected to the eyepiece portion 52 of the rigid endoscope 51 of the fourth embodiment, and the CCD camera 9 is connected to the eyepiece portion 62 of the flexible endoscope 61. The image is transmitted to the CCD camera 9 through the flexible mirror 61. Note that, in FIG. 6, the portion on the left from the alternate long and short dash line L is a region M where the magnetic field of the MRI apparatus 25 is strong.
Indicates. Further, 63 is a flexible mirror support arm.

In this case, the distance between the loop antenna 54 of the MRI apparatus 25 and the CCD camera 9 can be further increased, and the CCD camera 9 can be arranged outside the region M where the magnetic field of the MRI apparatus 25 is strong. , CCD camera 9
The electromagnetic interference between the MRI apparatus and the MRI apparatus 25 can be further reduced.

The present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows.

Note (Additional Item 1) A medical diagnostic apparatus characterized in that a CCD camera used in a magnetic field environment within the imaging range of the MRI apparatus is made of a non-magnetic material.

(Additional Item 2) CCD (Electronic Imaging Device) Built in a Catheter or Sheath Insertable into a Body Cavity
And a high-frequency antenna for MR imaging, wherein the electronic image sensor and a drive circuit for the electronic image sensor are non-magnetic materials.

(Purpose of Supplementary Note 2) Even in a medical diagnostic apparatus in which a CCD and a high-frequency antenna for MR imaging are built in a catheter or a sheath, there is a possibility that electromagnetic electromagnetic interference between the CCD and MRI may be aggravated.

Therefore, it is an object of the present invention to provide a medical diagnostic apparatus in which a CCD and a high-frequency antenna for MR imaging are built in a catheter or a sheath and which can prevent electromagnetic radio wave interference between CCD and MRI. It is what

(Additional Item 3) In the above Additional Item 2, C
MRI imaging is stopped during the electrical scanning for CD imaging, and CCD is performed during the electrical scanning for MRI imaging.
A medical diagnostic device characterized by suspending scanning of.

(Operation of Additional Item 3) Since the electrical scanning for CCD imaging and the electrical scanning for MRI imaging are not performed in the same period, the magnetic force of MRI does not affect the image quality of CCD. Magnetostriction by the CCD camera does not affect the MRI image.

[0059]

According to the present invention, since each component of the electronic image pickup apparatus used together with the magnetic resonance diagnostic apparatus is made of a non-magnetic material, it is possible to reduce interference due to mutual electromagnetic waves. Therefore, device failure due to mutual electromagnetic interference,
The generation of image noise is reduced, and more excellent diagnosis can be performed.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention (A)
Is a schematic configuration diagram of the entire medical diagnostic apparatus, and (B) is a schematic configuration diagram of a CCD camera.

FIG. 2 shows a second embodiment of the present invention (A)
Is a schematic configuration diagram of the entire medical diagnostic apparatus, and (B) is a schematic configuration diagram of a distal end portion of an insertion portion in the flexible endoscope.

FIG. 3A is an explanatory diagram for explaining drive timings of a CCD camera and an MRI apparatus, and FIG. 3B is an operation of continuously reproducing image data captured immediately before image pickup is stopped during a period in which the CCD camera is stopped. Explanatory drawing for demonstrating.

FIG. 4 is a schematic configuration diagram showing a main part configuration of a third embodiment of the present invention.

FIG. 5 is a schematic configuration diagram showing a main part configuration of a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram showing a main part configuration of a fifth embodiment of the present invention.

[Explanation of symbols]

2, 25 ... MRI device (magnetic resonance diagnostic device), 9, 2
4, 44 ... CCD camera (electronic image pickup device).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaru Karasawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A medical device characterized in that each component of an electronic imaging device used in a magnetic field environment within an imaging range of the magnetic resonance diagnostic device in combination with the magnetic resonance diagnostic device is made of a non-magnetic material. Diagnostic device.