JP2003190112A - Display device and magnetic resonance imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device and a magnetic resonance imaging device in which display information can be presented to a patient. <P>SOLUTION: Within a gantry, the display device is provided in front of the face of the patient lying on the back by an arm attached to a cradle or the display device is provided on the upper part of a head coil provided on the cradle and video is displayed on the display device to the patient. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to magnetic resonance imaging (MRI: Magnetic Resonance).
Imaging) device, and more particularly, to a magnetic resonance imaging device having a built-in display device capable of presenting visual information to a subject under examination.

[0002]

2. Description of the Related Art Magnetic resonance imaging (MRI: Mag)
When an image is captured by a natural resonance imaging device, the subject is housed in an elongated space called a bore at the center of the magnet system of the MRI device. Due to the limited power consumption of the magnet system of the MRI apparatus, the diameter of the bore cannot be increased. In order to increase the area of the bore while maintaining the required magnetic field strength within the area of the bore, the excitation current of the magnet system of the MRI device increases exponentially. In fact, the diameter of all bores of MRI apparatuses currently operating all over the world is 60 cm or less. If it becomes larger than that, the power consumption of the magnet system of the MRI apparatus will be more than doubled, which is not possible at this time. A subject inserted in a narrow space such as a bore may feel a strong sense of obstruction just by undergoing the examination. Normally, the diagnosis of the MRI apparatus lasts for about 10 minutes, but during the imaging, the subject could not bear the imaging, and sometimes the imaging could not be continued.

Although it is possible for a doctor, an operator, or a relative to exchange information with a subject by using a microphone and a speaker to reassure the subject, the noise of the coil in the MRI apparatus, especially the gradient coil is large. So usually
The subject wears earplugs to block sound, making it difficult to hear the sound from the speaker. In addition, noise tends to increase more and more due to high-speed imaging of the device, so that information exchange between the microphone and the speaker tends to be more difficult.

In such a situation, a method has been proposed in which visual information such as an image is presented to a subject to give the subject a sense of security and to convey the examination situation. However, since the bore in the gantry is small, a large display device cannot be introduced, and since a magnetic field is formed in the bore in the gantry, when a normal display device is introduced, the magnetic field is disturbed and artifacts appear in the image. While it may be generated and may affect the inspection, the display contents of the display device may be disturbed due to the influence of the strong magnetic field, or the electronic components incorporated in the display device may malfunction. From this point of view, as a method of providing display information to the subject in the bore, the method illustrated in FIGS. 9 and 10 is known.

FIG. 9 is a diagram illustrating one conventional method of providing an image to a subject. In FIG. 9, 201 is M
The gantry which is the inner wall of the cylindrical space at the center of the RI apparatus is shown. The inner space of the gantry 201 is a bore 202. A cradle 204 that accommodates the subject 203 is installed in the gantry 201, and a head coil 205 that images the head of the subject 203 is disposed on the cradle 204.

Subject 2 imaging the head shown in FIG.
The device for providing the video to 03 is a general-purpose projector 20.
6, screen 207, and mirror set 208. The screen 207 and the mirror set 208 are non-magnetic materials, and even when placed in the gantry 201, they do not interact with the magnetic field. However, the projector 206 contains magnetic material and cannot be placed inside the gantry 201. A video signal is transmitted from a host computer (not shown) to the projector 206, and the projector 20
6 projects the image on the screen 207 installed in the gantry 201, and the mirror set 208 installed on the upper part of the head coil 205 reflects the image and shows it to the subject 203 in the supine position. The mirror set 208 is
As shown in FIG. 10, it is composed of two mirrors 301 and 302, and a light beam 2 from the screen 207
09 is reflected twice as shown in FIG. 10, and the image on the screen 207 is projected on the eye of the subject 203.

However, according to this method, the general-purpose projector 206 is compatible with large-screen display,
Since the resolution is low and the screen 207 installed in the narrow gantry 201 has a small area, the image quality of the image shown to the subject is not good. Also, the mirror set 20
Since 8 is installed above the head coil 205, this method can be applied only when the head is photographed using this dedicated head coil 205. When imaging an area other than the head, for example, the waist, the light ray 209 is often blocked by the imaging coil of the area and cannot propagate to the mirror in front of the subject 203. In addition, subject 2
The mirror set 208 needs to be installed in the immediate vicinity of the eye of the subject 203 in order to clearly show the image in the mirror to the subject 03. Therefore, the subject feels oppressive.

Further, since the projector 206, the screen 207, and the mirror set 208, which are the constituent elements of the display device, are independent of each other, it is not easy to install the entire system. The installation of the system, such as adjusting the geometrical position of each element, alignment, adjusting the position and angle of the mirror set 208 with respect to the subject 203, takes a considerable amount of time. In fact, the installation time of this system is much longer than the inspection by MRI equipment.

[0009]

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-31
Japanese Patent No. 2446 proposes to directly install a cathode ray tube display (CRT) or a liquid crystal display (LCD) on an MRI apparatus. However, in this MRI apparatus, a CRT or a liquid crystal display is installed near the entrance of the bore and in the visual field of the subject,
This is mainly for operators, doctors, technicians, etc. to see real-time images that are rapidly updated near the MRI apparatus.
The purpose is not to provide the subject with a video.

Further, the applicant of the present invention is Japanese Patent Application No. 2000-294.
No. 999, proposes a new method. In the MRI apparatus disclosed in the specification, a liquid crystal display is embedded in the inner wall of the gantry near the subject's head and presents image information to the subject in front of the subject's eyes. However, in order to embed the liquid crystal display on the inner wall of the gantry, it is necessary to process the gantry,
Moreover, once the liquid crystal display is embedded in the inner wall of the gantry, the position and direction of the liquid crystal display cannot be easily changed, which is inconvenient to use. For example, it cannot be adjusted according to the height or body shape of the subject.

The present invention has been made in view of the problems of the related art, and its object is to be more visible to the subject in the bore, not to affect the magnetic field in the bore, and to be influenced by the magnetic field. An object of the present invention is to provide a display device and a magnetic resonance imaging device that can present the display information to the subject without the need.

[0012]

In order to achieve the object of the present invention, a display device according to the present invention is a gantry of a magnetic resonance imaging apparatus for picking up an image of a subject to be examined by using a magnetic resonance phenomenon. Display means arranged inside and displaying all or any of an image, a figure, a message to the subject, and a cradle attached to the subject, the subject lying on the cradle. And a fixing means arranged at a position where it is directly visible. Preferably, inside the gantry, an electric circuit connected to the display means, a signal line, and a power supply line are magnetically shielded. Also, preferably, the fixing means is made of a non-magnetic material. Further, preferably, the display means is a liquid crystal display. The fixing means has a sliding means for moving the display means on the fixing means in the longitudinal direction of the gantry. Further, the fixing means has a rotating means for rotating the display means on the fixing means with a direction orthogonal to a longitudinal direction of the gantry as a rotation center. Alternatively, the fixing means is a head coil that houses and images the head of the subject.

In order to achieve the object of the present invention, a magnetic resonance imaging apparatus according to the present invention is a magnetic resonance imaging apparatus for taking an image of a subject's part to be examined using a magnetic resonance phenomenon. The cradle that introduces into the bore inside the gantry does not substantially affect the magnetic field in the bore, and is substantially unaffected by the magnetic field, and is directly visible to the supine subject. In a possible form, display means for displaying all or any of an image, a figure, and a message to a subject, and a non-magnetic fixing means for fixing the display means to the cradle are provided. The fixing means has a slide means for moving the display means on the fixing means in the longitudinal direction of the bore, and the fixing means has the display means on the fixing means in the longitudinal direction of the bore. It has a rotation means for rotating about an orthogonal direction as a rotation center.

In order to achieve the above object, a magnetic resonance imaging apparatus according to the present invention is a magnetic resonance imaging apparatus for picking up an image of a subject's part to be examined using a magnetic resonance phenomenon. Is installed on a cradle that is introduced into the bore inside the gantry, and does not substantially affect the magnetic field in the bore on the upper part of the head coil that houses and images the head of the subject, and A display means for displaying, to the subject, all or any of an image, a figure, and a message in a form that can be directly visually recognized by a supine subject without being substantially affected by the magnetic field. . The head coil has a non-magnetic adjusting means for adjusting the arrangement of the display means so that the subject can directly visually recognize the display means. Preferably, inside the gantry, an electric circuit connected to the display means, a signal line, and a power supply line are magnetically shielded. Also, preferably, the display means is a liquid crystal display.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a magnetic resonance imaging apparatus according to the present invention will be described below with reference to the accompanying drawings. First Embodiment FIG. 1 illustrates a layout of a horizontal magnetic field type magnetic resonance imaging (MRI) apparatus 100 as one embodiment of the present invention. FIG. 2 shows an MRI unit 102 and an operator console 114 which constitute the MRI apparatus 100 shown in FIG.
3 is a schematic diagram of FIG. 3, and illustrates the configurations of the MRI unit 102 and the operator console 114 shown in FIG. 2.
FIG. 4 is a layout diagram of a display unit 180 that is a display device for a subject installed in the MRI unit 102.

As shown in FIGS. 1 and 2, in the MRI apparatus 100, the MRI section 102 is arranged in a scan room 111 which forms a closed space for preventing leakage of radiated electromagnetic waves from a magnet and entry of disturbance electromagnetic waves. An operator console 114 operated by an operator 113 in an operation room 112 provided adjacent to the scan room 111
Is provided. The scan rule 111 and the operation room 112 are partitioned by a wall 352, and the wall 352 is provided with a door 350 and a window glass 351.

The MRI unit 102 and the operator console 114 will be described below. [MRI Unit 102] As shown in FIGS. 2 and 3, the MRI unit 102 includes a gantry 150 and a magnet system 10.
1, an RF drive unit 171, a gradient drive unit 172, a data collection unit 173, and a control unit 174. Gantry 15
The inner space of 0 is called a bore 149, and in the bore 149, the cradle 153 on which the subject 99 is placed is placed in the transport section 15.
It is carried in by 2.

As shown in FIG. 3, the magnet system 1
01 has a main magnetic field magnet section 160, a gradient coil section 161, and an RF coil section 162 arranged around a magnet center (center position for scanning) in the gantry 150. The main magnetic field magnet unit 160 has a bore 1.
A static magnetic field is formed in 49. The direction of the static magnetic field is substantially parallel to the body axis direction of the subject 99. The gradient coil section 161 is
In order to give the magnetic resonance signal received by the RF coil unit 162 three-dimensional position information, the main magnetic field magnet unit 160
Creates a gradient magnetic field that gives a gradient to the strength of the static magnetic field formed by. The RF coil unit 162 includes the main magnetic field magnet unit 160.
A high-frequency magnetic field for exciting spins in the body of the subject 99 is formed in the static magnetic field space formed by, and an electromagnetic wave generated by the excited spins is received as a magnetic resonance signal.

The RF drive section 171 is provided with an RF coil section 162.
To generate an RF excitation signal to excite spins in the body of the subject 99. The gradient driver 172 is
A drive signal is applied to the gradient coil unit 161 to generate a gradient magnetic field. The data collection unit 173 captures the received signal received by the RF coil unit 162, collects the received signal, and outputs the received signal to the data processing unit 195 of the operator console 114. The control unit 174 controls the RF driving unit 171, the gradient driving unit 172, and the data collecting unit 173.

As shown in FIG. 4, a display unit 180 is provided above the head and in front of the face of the subject 99 who is carried into the bore 149 and is examined in a supine posture. FIG. 4 is a diagram for explaining the arrangement of the display unit 180 in the gantry 150, and a method of installing the display unit 180 will be described in detail later. The display unit 180 is connected to a computer that serves as a video presenting unit 197 arranged in the operator console 114, which will be described later, and the image information sent from the video presenting unit 197 is displayed on the display screen of the display unit 180. And presented to the subject. The image presentation unit 197 is an MR
It is connected to a data processing unit 195 which serves as an I host computer. The content displayed on the display unit 180 is, for example,
It is an image such as a scene that relaxes the examinee, a program that the child likes, a caution during shooting, and the like. As shown in FIG. 4, the display unit 180 directly displays the data processing unit 19.
5 is connected to the data processing unit 195.
The data which is the content of the current shooting being processed in step 1, the counted shooting time, or the remaining shooting time can be displayed on the display unit 180.

As the display section 180, for example, a liquid crystal display is used. Since the liquid crystal display is not affected by the magnetic field and hardly affects the magnetic field, it can be used in a strong magnetic field in the gantry 150. On the other hand, the CRT display device has a magnetic circuit inside and contains many magnetic substances such as iron, so it cannot be used in a strong magnetic field. However, in the liquid crystal display, the drive circuit and the like are semiconductor circuits, and the magnetic field is not affected at all. Therefore, it is desirable to magnetically shield only such a circuit portion. Since the circuit portion has a very small space, it is unlikely to affect the magnetic field to generate an artifact.
Of course, when the display unit 180 is introduced into the limited space in the bore 149, the display unit 180 has an appropriate size in view of the distance from the subject 99's eyes, that is, the subject's 99 visual field. Is preferable, for example, the screen size is 10 cm x 10
The thing of about cm is used.

[Operator Console 114] As shown in FIGS. 2 and 3, the operator console 114 is
Operation unit 190, operation display unit 194, data processing unit 19
5, an MRI display unit 196, and a video presentation unit 197.

The operation unit 190 is, for example, a keyboard or a mouse connected to a computer or the like, and outputs an operation signal according to the operation of the operator 113 to the data processing unit 19.
Output to 5. The operation display unit 194 displays predetermined information according to the operation state of the MRI unit 102 according to the operation signal from the operation unit 190. The data processing unit 195 responds to an operation signal from the operation unit 190, and the data collection unit 17
3, processing of data input from 3, instruction to the control unit 174,
And processing such as outputting an image signal to the operation display unit 194. From the inspection data obtained by detecting the magnetic resonance signals collected by the data collecting unit 173, the data processing unit 19
5 generates (reconstructs) an image of the subject region of the subject 99,
The generated image is displayed on the MRI display unit 196 or the display unit 1.
Output to 80 and display. In addition, the data processing unit 195
Also displays information such as shooting time on the display unit 180. M
The RI display unit 196 displays the image of the subject region of the subject 99 reconstructed by the data processing unit 195 and uses it for diagnosis.
The video presenting unit 197 outputs the video data to be presented to the subject 99 to the display unit 180 and displays it on the display unit 180.

Next, a method of installing the display section 180 shown in FIG. 4 will be described. In FIG. 4, both ends of the substantially arc-shaped arm 131 are detachably fixed to the cradle 153, and the arm 131 is located on the cradle 153 on the head of the subject 99 in the supine posture. The grip 132 is attached to the upper part of the arm 131, and the display 180 is fixed to the grip 132 above the head of the subject 99 and in front of the face. The diameter of the substantially arc-shaped arm 131 is smaller than the inner diameter of the gantry 150.
I never touch 50. Here, the arm 131 and the grip portion 132 correspond to the fixing means of the present invention.

The display unit 180 is attached so that it can be slid and rotated along the longitudinal direction of the gantry 150 while being held by the holding unit 132, and can be adjusted according to the position of the subject's head. Yes, and can be adjusted to an angle that is easy for the subject to see. FIG. 5 is a cross-sectional view taken along the arm 131 in FIG. 4, showing a method of installing the display unit 180. As shown in FIG. 5A, the grip portion 132 has, for example, a chuck shape having an insertion space in the center. The grip 132 is shown in FIG.
As shown in the figure, a groove 132a is formed in the longitudinal direction, and the screw 137a (137b) is inserted in a loosely fitted state. The upper part of the grip portion 132 has a screw 137a (137b).
Is formed with a screw hole.

The connecting portion 134 for connecting the grip portion 132 and the display portion 180 has an inserting portion 133 having a wide cross section.
33 is fitted into the insertion space at the center of the grip 132. With the screws 137a and 137b loosened, the connecting portion 134
Can be moved (slipped) in the direction perpendicular to the paper surface of FIG. After the position of the connection portion 134 is determined, the screws 137a and 137b are tightened to fix the connection portion 134 to the grip portion 132.

Screw holes are formed in the lower portion of the connecting portion 134 and the upper ends of the supporting members 136a and 136b of the display unit 180, and the screw 135 penetrating these screw holes is provided with the connecting portion 134 and the supporting members 136a and 136b. And the display unit 180 is connected to the connection unit 134. Screw 13
When 5 is lightly tightened, the angle of the display unit 180 can be adjusted. 6A and 6B are plan views showing how the display unit 180 is slid or rotated. The above adjustment is performed before the cradle 153 is conveyed into the bore 149.

The arm 1 for mounting the display unit 180 so as not to affect the magnetic field in the gantry 150.
31, grip portion 132, connection portion 134, screws 135, 13
7, all members such as the support member 136 are made of non-magnetic material such as resin and bronze.

Next, an operation example of the MRI apparatus 100 described above will be described. FIG. 7 is a flowchart for explaining an operation example of the MRI apparatus 100. In addition,
The operation described below is performed by the operation unit 19 by the operator 113.
It is performed based on the processing and control of the data processing unit 195 according to the operation of 0.

Step S91: First, the display unit 180 for presenting an image to the subject 99 is fixed to the arm 131 so as to be positioned in front of the face of the subject 99 in the supine position on the cradle 153, and the subject is examined. The head of the person 99,
The angle of the display unit 180 is adjusted so that the subject can easily see it.

Step S92: The subject 99 placed on the cradle 153 is moved by the transport unit 152 by the MRI.
It is carried into the bore 149 of the section 102.

Step S93: The subject site of the subject 99 is positioned at the magnet center in the bore 149. A static magnetic field is formed by the main magnetic field magnet unit 160 in a predetermined region inside the bore 149 including the magnet center.
In the state in which the subject part of the subject 99 is located at the magnet center, for example, the video presentation unit 197 or the data processing unit 195 displays the diagnostic caution on the display unit 180.

Step S94: Under the control of the control unit 174, the RF driving unit 171 drives the RF coil unit 162 and the gradient driving unit 172 drives the gradient coil unit 16.
1 is driven. As a result, a gradient magnetic field and a high-frequency magnetic field are formed in a predetermined region within the bore 149 including the magnet center, and an electromagnetic wave generated by the spin excited in the examined region of the subject 99 is extracted as a magnetic resonance signal.
This is collected by the data collecting unit 173, and the data processing unit 1 of the operator console 114 collects the data as the inspection result.
It is output to 95.

In the data processing unit 195, the data collection unit 1
The data input from 73 is stored in the memory, and a data space is formed in the memory. The data space constitutes a two-dimensional Fourier space. The data processing unit 195 converts the data of these two-dimensional Fourier spaces into two.
An image of the subject region of the subject 99 is generated (reconstructed) by performing the dimensional inverse Fourier transform. The reconstructed image of the examined region of the subject 99 is displayed on the MRI display unit 196 and is used for the diagnosis of the doctor. In addition, the image of the region to be examined is output to the display unit 180,
It is also possible to present it to the subject 99. Step S9
In 4, the image presenting unit 197 or the data processing unit 195 is used to provide an image such as a landscape for relaxing the subject 99,
The program that the child likes, the image of the region to be inspected, the remaining shooting time, etc. are output to the display unit 180.

Step S95: When the data collection of the test region of the test subject 99 is completed, the transport unit 152 carries the test subject 99 together with the cradle 153 out of the bore 149.

According to the MRI apparatus incorporating the display device of this embodiment, the display device can be easily installed. Since the display device has a distance from the subject, it does not give the subject a feeling of pressure. Even in the noise of the MRI apparatus during imaging, it is possible to give an instruction to the subject accurately. By presenting the image to the subject under examination, the feeling of blockage and anxiety of the subject can be reduced. It is possible to provide the image of the examined part of the subject to the subject in real time. It is possible to give a proper instruction to a hearing-impaired person or a hearing-impaired person even in the device. By using a display device such as a liquid crystal display, it is possible to provide a high-quality image to the subject without affecting the magnetic field in the gantry and without being affected by the magnetic field.

Second Embodiment In this embodiment, an MRI apparatus in which a display device is installed in a bore by another method will be described. The basic configuration of the MRI apparatus according to this embodiment is the same as that of the MRI apparatus 100 according to the first embodiment. FIG. 8 is a diagram illustrating a method of installing the display unit 180 in a bore (not shown) in the MRI apparatus (not shown) according to this embodiment. In FIG. 8, M of the first embodiment
The same reference numerals are used for the same components as the RI device 100. In FIG. 8A, the subject 9 is placed inside a bore (not shown).
A head coil 141 that transmits to the head of the subject 9 and receives a magnetic resonance signal from the head of the subject 99 is installed.
The head of the subject 99 is housed in the head coil 141, and the head is imaged. As shown in FIG. 8A, a storage box 142 is provided above the head coil 141, and a display unit 180 that provides an image to the subject 99 is installed in the storage box 142 and is in the supine position. The subject 99 whose head is to be inspected by looking at the display screen of the display unit 180.

As in the first embodiment, the display unit 18
0 is connected to the subject video presentation unit 197 installed in the operator console 114 and the data processing unit 195 serving as the MRI host computer, and is sent from the video presentation unit 197 or the data processing unit 195. The image information is displayed on the display screen of the display unit 180 and presented to the subject. The video presentation unit 197 is connected to the data processing unit 195 that serves as an MRI host computer. The content displayed on the display unit 180 includes, for example, an image of a subject to relax such as a scenery, a program the child likes, a caution during shooting, the content of the current shooting, the remaining shooting time, and the like. Here, the head coil 141 and the storage box 1
42, and the fixing member required for installing the display unit 180 correspond to the adjusting means of the present invention.

FIG. 8B is a plan view showing how the display unit 180 is installed in the storage box 142. Subject 99
In order to make it easy to see, the angle of the display unit 180 is adjusted by using, for example, the rotating means disclosed in the first embodiment.
Similar to the first embodiment, as the display unit 180, for example, a liquid crystal display having a small screen with a screen size of about 10 cm × 10 cm is used. The drive and wiring of the display unit 180 are appropriately shielded, and the main magnetic field magnet unit 16 is protected.
0, the gradient coil unit 161 and the RF coil unit 162 are electromagnetically separated. Other components located in the bore are also properly shielded and display 180
The member for fixing is made of a non-magnetic material such as resin or bronze.

The MRI apparatus of this embodiment operates as in the flow chart shown in FIG. 7, as in the first embodiment.

According to the MRI apparatus incorporating the display device of the present embodiment, by fixing the display device to the upper part of the head coil, it becomes unnecessary to adjust the position of the display device, and when the head is imaged. The diagnosis time can be shortened. The subject can be instructed accurately even in the noise during shooting. By presenting the image to the subject under examination, the feeling of blockage and anxiety of the subject can be reduced. It is possible to provide the image of the examined part of the subject to the subject in real time. It is possible to give a proper instruction to a hearing-impaired person or a hearing-impaired person even in the device. By using a liquid crystal display, high quality images can be provided to the subject.

The present invention is not limited to the above-described embodiments, and within the scope not departing from the gist of the present invention,
Various modifications are possible. If it has the effect of the present invention,
The method of attaching the display device of the present invention is not limited to the method disclosed above. In the embodiment of the present invention, a horizontal magnetic field type MR is used.
Although the layout of the MRI apparatus has been described by taking the I apparatus as an example, the present invention is also applicable to a vertical magnetic field type MRI apparatus. A microphone, a speaker, a camera, or the like may be provided in the gantry in order to exchange information with the subject.

[0043]

According to the MRI apparatus incorporating the display device of the present invention, the display device can be easily installed. Since the display device has a distance from the subject, it does not give the subject a feeling of pressure. Even in the noise of the MRI apparatus during imaging, it is possible to give an instruction to the subject accurately. By presenting the image to the subject under examination, the feeling of blockage and anxiety of the subject can be reduced. It is possible to provide the image of the examined part of the subject to the subject in real time. Deaf,
It is possible to give an accurate instruction to a hearing-impaired person even in the device. By using a display device such as a liquid crystal display, it is possible to provide a high-quality image to the subject without affecting the magnetic field in the gantry and without being affected by the magnetic field.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a layout of a magnetic resonance imaging apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the overall configuration of the magnetic resonance imaging apparatus according to the embodiment of the present invention.

FIG. 3 is a diagram for explaining a configuration of an MRI unit and an operator console of the magnetic resonance imaging apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating an arrangement of display devices in a gantry in the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

FIG. 5 is a sectional view (A) showing a method of mounting the display device in the gantry and a plan view (B) showing a slide mechanism in the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

FIG. 6 is a plan view showing a slide mechanism (A) and a rotation mechanism (B) of a display device installed in a bore in the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

FIG. 7 is a flowchart illustrating an operation of the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a display device (A) installed in a bore and a method (B) of installing the display device in the magnetic resonance imaging apparatus according to the second embodiment of the present invention.

FIG. 9 is a diagram illustrating an example of a conventional device for providing an image to a subject.

FIG. 10 is a plan view illustrating details of the conventional apparatus for providing an image to the subject shown in FIG. 9.

[Explanation of symbols]

99 ... Subject, 100 ... MRI apparatus, 101 ... Magnet system, 102 ... MRI unit, 111 ... Scan room, 112 ... Operation room, 113 ... Operator, 114
... operator console, 131 ... arm, 132 ... grip part, 133 ... insertion part, 134 ... connection part, 135 ... screw, 136 ... fixing member, 137 ... screw, 141 ... head coil, 142 ... storage box, 149 ... bore , 150 ...
Gantry, 152 ... Conveyor, 153 ... Cradle, 1
60 ... Main magnetic field magnet section, 161 ... Gradient coil section, 1
62 ... RF coil unit, 171 ... RF drive unit, 172 ... Gradient drive unit, 173 ... Data collection unit, 174 ... Control unit, 1
80 ... Display unit, 190 ... Operation unit, 194 ... Operation display unit, 195 ... Data processing unit, 196 ... MRI display unit, 1
97 ... Image presenting part, 201 ... Gantry, 202 ... Bore, 203 ... Subject, 204 ... Cradle, 205 ... Head coil, 206 ... Projector, 207 ... Screen, 208 ... Mirror set, 209 ... Rays, 301, 3
02 ... Mirror, 350 ... Door, 351 ... Window glass, 35
2 ... wall.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoki Hirata             127, 4-7 Asahigaoka, Hino City, Tokyo             GE Yokogawa Medical System Co., Ltd.             Within F-term (reference) 4C096 AB47 AD19 FC10

Claims (14)

[Claims] 1. A magnetic resonance imaging apparatus for picking up an image of an object to be examined by using a magnetic resonance phenomenon, which is arranged inside a gantry to provide an image, a figure, and / or a message to the object. A display device comprising: a display unit for displaying and a fixing unit attached to the cradle for arranging the display unit at a position directly visible by the subject lying on the cradle. 2. The display device according to claim 1, wherein an electric circuit connected to the display means, a signal line, and a power supply line are magnetically shielded inside the gantry. 3. The display device according to claim 1, wherein the fixing means has a slide means for moving the display means on the fixing means in a longitudinal direction of the gantry. 4. The fixing means includes rotating means for rotating the display means on the fixing means about a direction orthogonal to a longitudinal direction of the gantry as a rotation center.
Any one of the display devices. 5. The display device according to claim 1, wherein the fixing means is a head coil that houses and images the head of the subject. 6. The display device according to claim 1, wherein the fixing means is made of a non-magnetic material. 7. The display device according to claim 1, wherein the display means is a liquid crystal display. 8. A magnetic resonance imaging apparatus for imaging a subject's part to be examined using a magnetic resonance phenomenon, wherein a cradle for introducing the subject into a bore inside a gantry and a magnetic field in the bore are substantially disposed. , And substantially without being affected by the magnetic field, in a form that can be directly visually recognized by a supine subject, an image, a figure, all or any of the messages to the subject. A magnetic resonance imaging apparatus comprising: a display means for displaying and a non-magnetic fixing means for fixing the display means to the cradle. 9. The magnetic resonance imaging apparatus according to claim 8, wherein the fixing means has a sliding means for moving the display means on the fixing means in a longitudinal direction of the bore. 10. The fixing means includes a rotating means for rotating the display means on the fixing means with a direction orthogonal to a longitudinal direction of the bore as a rotation center.
The magnetic resonance imaging apparatus according to. 11. A magnetic resonance imaging apparatus for imaging a subject's part to be examined using a magnetic resonance phenomenon, the device being installed on a cradle for introducing the subject into a bore inside a gantry, Above the head coil for accommodating and imaging the head of the subject, the supine test subject without substantially affecting the magnetic field in the bore and substantially without being affected by the magnetic field. A magnetic resonance imaging apparatus, characterized in that the subject is provided with display means for displaying all or any of an image, a figure, and a message in a form that can be directly visually recognized by the person. 12. The magnetic resonance according to claim 11, wherein the head coil has non-magnetic adjusting means for adjusting the arrangement of the display means so that the subject can directly visually recognize the display means. Imaging equipment. 13. The magnetic resonance imaging apparatus according to claim 8, wherein an electric circuit connected to the display means, a signal line, and a power supply line are magnetically shielded inside the gantry. 14. The magnetic resonance imaging apparatus according to claim 8, wherein the display means is a liquid crystal display.