JPH08112266A - Simulator for scan room of mri apparatus - Google Patents

Abstract

PURPOSE: To provide a simulator capable of carrying out an electromagnetic radiation test and a radiation immunity test electrically simulating a scan room of an MRI apparatus while allowing the transportation thereof into test fields outdoors or radio wave dark rooms relatively with ease. CONSTITUTION: This simulator 100 includes a mini shield room 1 which is smaller than a shield room of a scan room of an MRI apparatus while being provided with wheels 4 on the bottom part thereof and electric equipment (31-38) which are set in the mini shield room 1 while being equivalent to those in the scan room of the MRI apparatus, none of a magnet and a mobile table of the scan room of the MRI apparatus. With the absence of the magnet and the mobile table, the apparatus is smaller and lighter and the wheels allow the carrying thereof to test fields or radio wave dark rooms relatively with ease. Including the electric equipment equivalent to those in the scan room of the MRI apparatus allows the simulating of the scan room of the MRU apparatus, thereby an electromagnetic radiation test and a radiation immunity test can be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is applied to MRI (Magnetic R
esonance Imaging) Scan room simulator device. More specifically, the present invention relates to a scan room simulator device of an MRI apparatus capable of performing an electromagnetic radiation test, a radiation immunity (electromagnetic compatibility) test, and the like.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing a configuration of a scan room of an MRI apparatus. The scan room 500 of this MRI apparatus has a magnet 2 inside the shield room 10.
0, a movable table 25 that can move in and out of the space of the magnet 20, and electric devices (31 to 38) are installed. The electric devices (31 to 38) include an interface 31 for the outside and an internal controller 3
2, gradient magnetic field coil 33, RF coil 34, patient monitoring camera 35, table control panel 36
And a display panel 37 and a table driving motor 38. The internal controller 32 includes a gradient magnetic field amplifier and an RF amplifier. The scan room 500 of the MRI apparatus has, for example, a length of 7 m and a width of 7 m.
m, height 4 m. The weight is, for example, 8 tons.

[0003]

[Problems to be Solved by the Invention] CE (Communaute Euro
In order to obtain the peenne mark, EMC (Electric
It is necessary to carry out the test items of Magnetic Compatibility). EMC test items include CISPRII (Comite
International Special desPerturbations Radioelect
riques publication 11) electromagnetic radiation test, IEC
(International Electrical Commission) 8
01-3 Radiated Immunity Test etc. are included.
In the electromagnetic radiation test, the device to be measured is placed on a rotating table, a measurement antenna is installed at a location 30 m away from the device to be measured, and the rotating table is rotated to measure the electromagnetic radiation intensity in all directions of the device to be measured. taking measurement. Since it is necessary to separate the device under test and the antenna for measurement by 30 m, it is often performed in an outdoor test site (open site). In the radiated immunity test, a test electromagnetic wave is externally applied to the device under test to measure the noise resistance of the device under test. It is necessary to perform the test in an anechoic chamber to remove the effects of electromagnetic waves other than the test electromagnetic waves.

Now, the scan room 500 of the MRI apparatus
On the other hand, in order to perform an electromagnetic radiation test or a radiation immunity test, it is necessary to bring the scan room 500 of the MRI apparatus to a test field or an anechoic chamber outside. However, the scan room 500 of the MRI apparatus has, for example, a length of 7 m, a width of 7 m, a height of 4 m, and a weight of 8 tons. For this reason, it is difficult to carry it to an outdoor test site or an anechoic chamber, and there is a problem that the test cannot be performed in practice. Therefore, an object of the present invention is that it can be relatively easily transported to an outdoor test site or an anechoic chamber, and it can electrically simulate a scan room of an MRI apparatus to perform an electromagnetic radiation test or a radiation immunity test. To provide a simulator device for a scan room of an MRI device.

[0005]

According to the present invention, a magnet, a movable table capable of moving in and out of a space of the magnet, and an electric device including a table driving motor for driving the movable table are provided in a shielded room. A simulator device for electrically simulating a scan room of an installed MRI device, the mini shield room having a smaller size than the shield room and provided with wheels at the bottom,
An electric device installed in the mini-shielded room and having the same electric device as the electric device.
A simulator device for a scan room of an RI device is provided. In the above configuration, the electric equipment installed in the mini-shielded room has an interface with the outside,
It preferably includes an internal controller, a gradient coil, an RF coil, a patient monitoring camera, a table control panel, a display panel and a table drive motor. The mini shield room has the same shield characteristics as the shield room.

[0006]

The scan room simulator of the MRI apparatus of the present invention comprises a mini-shield room smaller than the shield room of the scan room, and wheels are provided at the bottom of the mini-shield room. In addition, an electric device equivalent to the electric device is provided in the mini-shield room. Moreover, it does not have a magnet and a movable table. The magnet has a length of 2.5 m, a width of 1.5 m, a height of 2 m, and a weight of 7 tons, and the movable table has a required space of 5 m, for example. The magnet and the movable table dominate the size and weight of the scan room. I have decided. However, since the simulator device of the present invention does not include the magnet and the movable table, the size and weight can be reduced to, for example, length 2 m, width 1.5 m, height 2 m, and weight 1 ton. In this way, the size and weight are reduced, and since the wheels are provided at the bottom of the mini shield room, it can be transported relatively easily to an outdoor test site or an anechoic chamber. Further, since the electric equipment equivalent to the electric equipment is provided, the scan room of the MRI apparatus can be electrically simulated, and the electromagnetic radiation test and the radiation immunity test can be performed.

[0007]

The present invention will be described in more detail with reference to the embodiments shown in the drawings. The present invention is not limited to this.

FIG. 1 is a block diagram showing a simulator device of a scan room of an MRI apparatus according to an embodiment of the present invention. This simulator device 100 is smaller than the shielded room (10 in FIG. 4) of the scan room of the MRI apparatus, and has a mini shielded room 1 having wheels 4 at the bottom.
And installed in the mini shield room 1 and MRI
An electric device (31 to 38) equivalent to the electric device of the scan room of the apparatus is provided, and the magnet (20 of FIG. 4) and the movable table (25 of FIG. 4) of the scan room of the MRI apparatus are not provided. . The electric device (31 to 3)
8) is an interface 31 to the outside, an internal controller 32, a gradient magnetic field coil 33, an RF coil 34, a patient monitoring camera 35, a table control panel 36, a display panel 37, and a table driving motor 38. Is included. The internal controller 32
Includes a gradient magnetic field amplifier and an RF amplifier. The size of the simulator device 100 is, for example, 2 m in length, 1.5 m in width, and 2 m in height. The weight is, for example, 1 ton.

When conducting an electromagnetic radiation test, as shown in FIG. 2, the simulator device 100 is installed on a turntable T at a test site, and the simulator devices 100 to 3 are installed.
The measurement antenna A is installed at a position 0 m away. Then, the simulator device 100 is operated in the same manner as the actual scan of the MRI device, the turntable T is rotated,
The electromagnetic radiation intensity in all directions of the simulator device 100 is measured by the receiver Rx. When performing a radiated immunity test, as shown in FIG.
00 is carried into the anechoic chamber D, the simulator device 100 is operated similarly to the actual scanning of the MRI device, the test electromagnetic wave is applied by the transmitter Tx, and the patient monitoring camera 35
Is used to monitor the table control panel 36 and the display panel 37 to monitor the operation and measure the noise resistance. The electric devices (31 to 38) operate in the same manner as in the scan room of an actual MRI apparatus, but no image appears because there is no magnet. Further, since there is no movable table, the table drive motor 38 simply rotates.

[0010]

According to the scan room simulator of the MRI apparatus of the present invention, since it has no magnet or movable table, it is small and lightweight, and since it has wheels, it is relatively easy to use in an outdoor test site or an anechoic chamber. Can be transported to. Further, since the electric equipment equivalent to the electric equipment is provided, the scan room of the MRI apparatus can be electrically simulated, and the electromagnetic radiation test and the radiation immunity test can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a simulator device in a scan room of an MRI apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram when an electromagnetic radiation test is performed using the simulator device of FIG.

FIG. 3 is an explanatory diagram when a radiated immunity test is performed using the simulator device of FIG. 1.

FIG. 4 is a configuration diagram of a scan room of the MRI apparatus.

[Explanation of symbols]

100 MRI device scan room simulator device 1 Mini shield room 4 Wheels 31 Interface 32 Controller 33 Gradient magnetic field coil 34 RF coil 35 Patient monitoring camera 36 Table control panel 37 Display panel 38 Table drive motor 500 MRI device scan room 10 Shield Room 20 magnet 25 movable table

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G01R 31/00 33/20 H05K 9/00 N 9307-2G G01R 33/22

Claims (1)

[Claims] 1. A magnet, a movable table that can move in and out of a space of the magnet in a shielded room,
A simulator device for electrically simulating a scan room of an MRI apparatus, in which an electric device including a table drive motor for driving the movable table is installed, the simulator device being smaller than the shield room and having wheels at the bottom. A simulator device for a scan room of an MRI apparatus, comprising: the provided mini-shielded room; and an electric device installed in the mini-shielded room and equivalent to the electric device.