JPS622939A - Nuclear magnetic resonance tomographic diagnostic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to a nuclear magnetic resonance tomography apparatus used in clinical diagnosis and the like.

[Conventional technology]

A conventional nuclear magnetic resonance tomography diagnostic apparatus is constructed as shown in FIG. In other words, (1) is the magnet, +21 is the human body of the patient to be diagnosed, +01 is the bed holding the human body, +81 is the high-frequency coil wound around the human body (2), (41 high-frequency coils ( When sending electromagnetic waves to 3), a transceiver receives electromagnetic waves from the common human body (2), +51
1- is a gradient magnetic field coil consisting of a plurality of pairs, (6) is a power source for the gradient magnetic field coil, (7) is a control circuit that completely controls the transmitter/receiver (4) and the gradient magnetic field coil with the source (6), (8) A computer, +91, interlocked with the control circuit (7) displays the output of the picture table display computer (8) as an image.

Such a nuclear magnetic resonance tomography system applies a uniform static magnetic field to a human body (2) using a magnet (1), and transmits electromagnetic waves corresponding to the Zeeman energy of a specific atomic nucleus in the human body (2) to a transmitter and receiver. (High frequency coil (3) from the transmitter of 41
The electromagnetic waves irradiate the human body (2) through the electromagnetic waves.
2) causing a resonant transition of a specific atomic nucleus from the ground state to the excited state;

At this time, a gradient magnetic field is applied so that resonant transition occurs only within a certain fault plane. Then, when the irradiation of electromagnetic waves is stopped, electromagnetic waves are emitted from the atomic nuclei in the human body (2), and this electromagnetic waves are detected by the receiving section of the transmitter/receiver (41) via the high frequency coil (3). At this time, a gradient is applied to the static magnetic field using a gradient magnetic field coil (6), and it is determined from which position on the above-mentioned tomographic plane the signal is coming from.The computer (8) applies a current to the transceiver (4) and the gradient magnetic field coil (5). The power supply for the gradient magnetic field coil (6) is controlled via the control circuit (7).
9) Display the image.

The details are described in, for example, the Japanese Society of Radiological Technologists' ``Theory and Clinical Practice of mrNMH'' published by Magbros Publishing.

[Problem that the invention seeks to solve]

Conventional nuclear magnetic resonance tomography diagnostic equipment was configured as shown below, and could diagnose only one person per measurement. The measurement time for one patient is, for example, about 30 minutes, and from the viewpoint of measurement efficiency, it is not very efficient.

This invention was made to solve the problems such as - [-], and is a nuclear magnetic resonance tomography system that can increase the measurement efficiency of the system. The purpose is to obtain.

[Means for solving problems]

The nuclear magnetic resonance tomography apparatus according to the present invention has all the beds for the first few people in the apparatus, applies all static magnetic fields, gradient magnetic fields, and high-frequency magnetic fields to multiple human bodies, and receives signals Ji+ from multiple human bodies. This method is used to obtain tomographic images of multiple human bodies.

[Function] The nuclear magnetic resonance tomography apparatus according to the present invention has one bed for a plurality of people in the apparatus, so that tomographic images of a plurality of people can be obtained simultaneously, improving the measurement efficiency of the apparatus.

[Actual example of the invention] Is the following an example of this invention? The diagram will be explained. 1st
The figure is a configuration diagram showing a nuclear magnetic resonance tomography diagnostic apparatus according to an actual case of the present invention.
In this case, there are only two people in the human body.

(+010-i is a bell r that fully supports multiple human bodies, in this case two people. A magnetic field coil (5) and a gradient magnetic field coil power source (6) are used to transmit and receive all information on the imaging positions within a plurality of human bodies (811). ) by magnet (1)
, the high frequency transmitting/receiving means, and the control means for controlling the gradient magnetic field applying means constitute an image display means for converting and displaying a received signal into an image using an image display (9) and a computer (8).

Next I will explain the operation.

Images are taken by transmitting and receiving in the same operation numbers as in the past, but in Figure 1, one human body (2) is replaced by two people (2), and the method of acquiring tomographic images is as follows. By using the multi-slice method, three-dimensional Fourier transform method, three-dimensional projection reconstruction, etc., N cross-sectional images of two patients can be obtained simultaneously.

In addition, in the above example of actual regret, d Vera 1:2 units is -1- lower + c M
It is also possible to set up one bed or two, as shown in Figure 2, horizontally and obtain all tomographic images of the head at one time.

Furthermore, in the above embodiment, the transmitting coil and the receiving coil are used as both, and one transmitting/receiving coil transmits and receives all electromagnetic waves to a plurality of human body ICs, whereas one transmitting coil serves as a high frequency transmitting/receiving means and transmits electromagnetic waves to a plurality of human bodies. and a plurality of receiving coils that individually receive electromagnetic waves from a plurality of human bodies. In this case, each receiving coil may be connected in series or in parallel, or each receiving coil may be connected to a bipedance matching device, and then mutually coupled.
, but that's fine.

〔Effect of the invention〕

As described above, according to the present invention, since the device is installed in all beds for multiple people, tomographic images of multiple human bodies can be acquired simultaneously, which has the effect of increasing the measurement efficiency of the device. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a nuclear magnetic resonance tomography apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a nuclear magnetic resonance tomography apparatus according to another embodiment of the present invention. and FIG. 3 is a configuration diagram showing a conventional nuclear magnetic resonance tomography diagnostic apparatus. +11... Magnet, (21... Human body, (3)... High frequency coil, (4)... Transmitter/receiver, (6)... Gradient magnetic field coil, (6)... Gradient @ field coil Power supply, (7)・
. . . Control 1 circuit, (8) . . . Computer, (91 . . . Image display) In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (3)

[Claims] (1) A magnet that applies a uniform static magnetic field to a plurality of human bodies, a high frequency transmitting/receiving means that transmits and receives electromagnetic waves matching the Zeeman energy to specific atomic nuclei in the plurality of human bodies, and imaging position information in the plurality of human bodies. a gradient magnetic field applying means for adding the above to the transmitted and received signals, a control means for controlling the magnet, the high frequency transmitting and receiving means, and the gradient magnetic field applying means, an image display means for converting and displaying the received signal as an image, and provided in the device, A nuclear magnetic resonance tomography system equipped with beds for multiple people to diagnose multiple human bodies at the same time. (2) The nuclear magnetic resonance tomography diagnostic apparatus according to claim 1, wherein the high frequency transmitting/receiving means transmits and receives electromagnetic waves to a plurality of human bodies using one transmitting/receiving coil. (3) The high frequency transmitting/receiving means has one transmitting coil that transmits electromagnetic waves to a plurality of human bodies, and a plurality of receiving coils that individually receive the electromagnetic waves from the plurality of human bodies. The nuclear magnetic resonance tomography diagnostic device described in Section 1.