JPH0347234A - Apparatus for magnetic resonance imaging - Google Patents

Abstract

PURPOSE:To enable a subject to confirm an indication easily at any position in a frame dome by fitting an indicator displaying an information for the subject to a top plate or an attachment to the top plate. CONSTITUTION:The title apparatus is furnished with a frame dome 3, wherein a photographing space 1 is installed, and a bed instrument 7 equipped with a top plate 5 which is slid right and left and inserted into the photographing space. The top plate 5 is furnished with a headrest 15 for setting the head of subject P and a U-shaped arm 17 is attached to the headrest 15. An indicator 19 displaying the rest of photographing time in reversal letters is arranged at an upper position of one end part 17a of the arm 17, and a mirror 21, which reflects the reversal letters displayed by the indicator 19 toward the subject P laid on the top plate 5, is set at the other end part 17b. It is possible for the subject to see an indication easily at any position in the frame dome 3 by these arrangements.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides magnetic resonance signals (
A magnetic resonance imaging device (hereinafter referred to as an MHI device) equipped with a display that collects MR signals (hereinafter referred to as MR signals) and displays information to be transmitted to the subject, such as remaining imaging time.
Regarding.

(Prior Art) As is well known, this type of MRI apparatus is equipped with a pedestal dome in which an imaging space is provided, and a bed device provided with a top plate that can freely slide toward the imaging space of the trestle dome. ing. When photographing a subject, the subject is placed on the top plate, and the top plate is slid as appropriate depending on the part to be imaged of the subject, and the part to be imaged of the subject is inserted into the imaging space. .

In this type of MRr apparatus, the imaging time may range from several tens of minutes to an hour depending on the imaging method. When imaging takes a long time in this manner, the subject is informed in advance of the approximate time required for imaging in order to alleviate the subject's feelings of anxiety and impatience.

Furthermore, in recent years, in order to inform the patient of the remaining time of imaging even during imaging, a display that displays the remaining imaging time has been placed outside the dome of the gantry. The image is shown to the subject through two mirrors attached to the vicinity of the head, for example, a headrest.

In an MHI device equipped with this type of display and mirror, when the subject slides within the gantry dome, the position of the mirror also changes within the gantry dome, but the position of the display remains constant outside the gantry dome. is taking. Therefore, unless the subject is always placed in a fixed position within the gantry dome, the display on the display cannot be viewed in the same state.

(Problems to be Solved by the Invention) In other words, the position of the subject within the gantry dome often changes depending on the amount of imaging over a long period of time, and when the distance between the subject and the display changes in this way.

There is a problem in that the size of the display image reflected in the mirror changes or the position shifts, making it difficult for the subject to see.

The present invention has been made in order to solve these conventional problems, and an object of the present invention is to provide a magnetic resonance imaging apparatus in which the display can be easily seen no matter where the subject is located within the gantry dome. shall be.

[Structure of the Invention] Means for Decomposing the Problem) In order to achieve the above object, the magnetic resonance imaging device according to the present invention includes a display that displays information to be transmitted to the subject, such as the remaining imaging time. The gist is that the device is attached to a top plate or a top plate mounting member on which a subject is placed and slides in the imaging space.

Furthermore, the display device displays inverted characters, and the inverted characters are viewed by the subject through a mirror.

(effect) According to the above configuration, the following effects are achieved.

In other words, by attaching a display that displays information to be transmitted to the subject, such as the remaining imaging time, to the top plate or top plate attachment member on which the subject is placed and slides in the imaging space, it is possible to easily monitor the subject within the gantry dome. Even if the position of the specimen changes, the display will move with the movement of the specimen and the visibility will not change, so the display can be easily seen no matter where the specimen is in the dome. I can do it.

In addition, by displaying inverted characters on one display and allowing the subject to view the inverted characters through a mirror, the display can be displayed even though the components are kept to a minimum by adding one mirror to the display. Flexibility can be provided in the installation position of the container.

(Example) Hereinafter, an example of the MHI device according to the present invention will be described.
This will be explained with reference to FIG.

In FIG. 1 showing a schematic configuration of the MRT apparatus, this MRI apparatus includes a gantry dome 3 in which various magnetic field coils to be described later are installed and an imaging space 1 provided therein;
The top plate 5 is slid horizontally and inserted into the shooting space.
A bed device 7 is provided.

The gantry dome 3 may be provided with a static magnetic field coil (static magnetic field correction shim coil) using a normal conduction or superconducting method as a magnet assembly configured to accommodate the subject P therein. ) Equipped with a gradient magnetic field coil 11 that generates a gradient magnetic field for providing positional information of the induced site of the 1MR signal, and a transmitting/receiving coil 13 that transmits a rotating high-frequency magnetic field for excitation and detects reception of the excited MR multiplied signal. are doing.

Although not shown, as an electrical system, the static magnetic field coil 9
If it is a superconducting type, it includes a refrigerant supply control system, mainly a static magnetic field control system that controls energization of a static magnetic field power source, an X-axis, Y-axis, and Z-axis gradient magnetic field power source, a transmitter, a receiver,
It is equipped with a sequencer that executes a predetermined pulse sequence, a computer system and a display that control these and perform signal processing and display of detection signals.

In an MHI device having such a configuration.

A headrest 15 on which the head of the subject P is placed is attached to the top plate 5. And this headrest 1
From 5 onwards, an arm 17 having a U-shape is attached. That is, the arm 17 has one end 17a fixed to the headrest 15 and raised from the top plate 5, and the other end 17b arranged near the face of the subject P. Above one end 17a of this arm 17 is attached a display for displaying the remaining shooting time in inverted characters, and the other end 17b is provided with inverted characters displayed on the display. A mirror 21 is provided to project an image toward the subject P placed on the plate 5. That is, a display module is used for one of the display devices, in which the remaining imaging time is previously converted into inverted characters so that the subject P can read it directly through the mirror 21.

Therefore, in this embodiment, one display for displaying the remaining imaging time is attached to the headrest 15 via the arm 17 and placed near the head of the subject P. During this period, even when the position of the subject P in the gantry dome 3 changes due to the slide of the top plate 5 due to a change in the position of the imaging site, the display 19 also moves with the movement of the subject P. This solves the problem of difficulty in viewing, such as the size of the display image reflected on the mirror changing or shifting when the subject is slid while the display unit is placed at the external position of the gantry dome 3. The display can be easily seen no matter where P is located within the pedestal dome 3.

In addition, in this embodiment, the display 19 displays inverted characters, and the inverted characters are made visible to the subject P through the mirror 21.If the display is not inverted, two mirrors are displayed. You only need one mirror compared to what you would need. In addition, although the component is kept small by adding only one mirror, it is no longer necessary to route a single display device around the narrow mount dome 3 to a position where it can be seen by the subject.
It becomes possible to arrange the display 19 with flexibility.

[Effects of the Invention] As explained in detail above, in the magnetic resonance imaging apparatus according to the present invention, the display device for displaying information to be transmitted to the subject, such as the remaining imaging time, is placed on the display when the subject is placed and the image is taken. By attaching it to the top plate or top plate attachment parts that slide in space, even if the position of the subject changes within the mount dome,
Since the display moves with the movement of the subject and changes in visibility are avoided, the display can be easily seen no matter where the subject is located within the gantry dome.

In addition, by displaying inverted characters on the display and allowing the subject to view the inverted characters through a mirror, the display can be displayed even though the components are kept to a minimum by adding one mirror to the display. Flexibility can be provided in the installation position of the container.

[Brief explanation of drawings]

FIG. 1 is a schematic structural explanatory diagram showing an embodiment of an MHI device to which the present invention is applied. 1... Shooting space 3... Mount dome 5... Top plate 19... Display 21... Mirror

Claims (2)

[Claims] (1) Magnetic resonance characterized in that a display device that displays information to be transmitted to the subject, such as remaining imaging time, is attached to the top plate or top plate mounting member on which the subject is placed and slides in the imaging space. Imaging equipment. (2) The magnetic resonance imaging apparatus according to claim 1, wherein the display device displays reversed characters, and the reversed characters are viewed by the subject through a mirror.