JPH03264049A - Magnetic resonance diagnosing device - Google Patents

Abstract

PURPOSE:To realize a correct diagnosis for function by searching the spectrum information in the related region which is common for a tomographic image information and the spectroscopic information. CONSTITUTION:A file system is constituted of a first filing device 14, second filing device 15, third filing device 16, and a controller 17. The first filing device 14 memorizes a plurality of proton tomographic images PIi, and the second filing device 15 memorizes a plurality of density distribution images SIj, and the third filing device 16 memorizes a plurality of the spectrum images of <31>P, and the controller 17 calls out the images under the control of a computer 10, console 12, and a mouse device 13, and multi-displays the images on a monitor 11. On the screen 20 of the monitor 11, the proton image PIi having high spacial resolving power is displayed at the same time, besides the P density distribution image SIj having low spacial resolving power, and further, since the ROIk set on the screen image is interlocked with both the images, the setting of the region of the spectrum images SPROIk can be carried out, referring the proton image PIl having the high spacial resolving power.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to magnetic resonance (MR)
The present invention relates to a magnetic resonance diagnostic apparatus that obtains morphological information such as slice images and functional information such as spectroscopic images of a subject (living body) by utilizing the (sonance) phenomenon.

(Prior art) Magnetic resonance is a phenomenon in which an atomic nucleus with non-zero spin and magnetic moment placed in a static magnetic field resonantly absorbs and emits only electromagnetic waves of a specific frequency. The angular frequency ω0 (ωo−2πsi0.ν) shown in

; Larmor frequency).

ω0−γH0 Here, γ is the gyromagnetic ratio specific to the type of atomic nucleus,
Moreover, %HO is the static magnetic field strength.

An apparatus that performs biological diagnosis using the above-mentioned principle processes electromagnetic waves of the same frequency as above that are induced after the above-mentioned resonance absorption, and calculates nuclear density, longitudinal relaxation time T1. Transverse relaxation time T2. Diagnostic information that reflects information such as flow and chemical shift, such as slice images of a subject, can be obtained non-invasively.

Collecting diagnostic information by magnetic resonance can excite all parts of a subject placed in a static magnetic field and collect signals, but there are limitations in the equipment configuration and clinical requirements for imaging images. Therefore, in an actual device, a specific part of a specific atomic nucleus is excited and its signal is collected.

In this case, the specific region to be imaged is generally a sliced region with a certain thickness;
Magnetic resonance signals (MR multiplied signals) of echo signals and FID signals from this slice site are collected by performing a data encoding process many times, and these data groups are subjected to image reconstruction processing using, for example, a two-dimensional Fourier transform method. By doing so, a slice image of the specific region is generated.

In such a magnetic resonance diagnostic device, protons (I
Using the tomographic image information related to H) as a positioning image,
Spectroscopic images of other nuclides may be obtained and both displayed on the same screen, as well as the spectrum of a specific region.

FIG. 7 shows a conventional display example, in which a proton tomographic image PI is displayed at the top left of one screen 20, and the data for each voxel of, for example, 31p spectroscopy is integrated in the frequency direction at the bottom left. The phosphorus density distribution image SI that is
P is displayed.

(Problems to be Solved by the Invention) In the conventional method described above, the ROI setting for the proton tomographic image PI and the phosphorus density distribution image SI is performed separately, but the phosphorus density distribution image St has a low spatial resolution. There was a problem in that the operator was unable to set the ROI in the region where the spectrum SP was desired to be displayed because the morphological information was insufficient.

Also, since both images have Rots that can be set separately, if ROI, ROI2, and ROI2 are displayed at different positions, as shown in Figure 7, it is difficult to determine which ROI the spectrum SP relates to. was unclear, leading to misdiagnosis.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnetic resonance diagnostic apparatus that allows easy setting of a region in which a spectrum SP is desired to be displayed and that enables error-free functional diagnosis.

[Structure of the Invention] In order to solve the above-mentioned problems and achieve the object, the present invention has a structure that enhances the following means.

That is, the present invention generates a magnetic resonance phenomenon involving one or more atomic nuclei in a specific region of a subject, collects magnetic resonance signals generated by the phenomenon, and generates and displays diagnostic information based on magnetic resonance parameters. The magnetic resonance diagnostic apparatus includes a file device that stores tomographic image information regarding protons, spectroscopic image information regarding at least one nucleus other than the protons, and spectrum information, and the spectrum information is stored in the tomographic image. The method is characterized in that a region of interest that is commonly attached to the information and the spectroscopic information is searched.

(Function) According to such a configuration, when setting the area in which the spectrum SP is desired to be displayed, the setting is performed using tomographic image information regarding protons, which is an image with high spatial resolution.
Setting can be made to a desired area, making error-free functional diagnosis possible and easy.

(Embodiment) An embodiment of the magnetic resonance diagnostic apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the magnetic resonance diagnostic apparatus of this embodiment, FIGS. 2 to 4 are diagrams showing the data structure of information to be filed in the magnetic resonance diagnostic apparatus of this embodiment, and FIG. FIG. 2 is a diagram showing an example of display in the magnetic resonance diagnostic apparatus of the present embodiment.

As shown in Fig. 1, a magnet assembly MA capable of accommodating a subject P therein includes a static magnetic field coil (a static magnetic field correction shim coil is added) using a normal conduction or superconducting method. There are also.)l
, a gradient magnetic field generating coil 2 on the X, Y, and Z axes for generating a gradient magnetic field for providing positional information of the induced site of the magnetic resonance signal, and a magnetic resonance signal ( A transmitter 4 includes a probe 3, which is a transmitting/receiving system for detecting the MR multiplied signal, and includes a transmitting coil and a receiving coil, for example, and controls the transmission of RF pulses, a receiver 5, which controls the reception of the induced MR multiplied signal, X-axis gradient magnetic field power supply (GXA) that performs excitation control of each of the gradient magnetic field generating coils 2 on the x, y, and z axes 6. Y-axis gradient magnetic field power supply (GYA)
) 7° 2-axis gradient magnetic field power supply (GZA) 8, a sequencer 9 that can execute a pulse sequence for slice image generation and a pulse sequence for spectroscopy generation, and a sequencer 9 that controls these and performs signal processing of detection signals and Computer 10, monitor 11, console 12, mouse device (or trackball device) that displays the display
It has 13.

In addition to the basic configuration described above, it has a file system. This file system is based on the first file device 14.
, second file device 15, third file device 16,
It is composed of a controller 17.

Here, the first file device 14 is capable of storing a plurality of proton tomographic images PI+ that can be searched using the subject identification number and imaging date as indexes, as shown in the data structure shown in FIG. .

Here, the proton tomographic image PI has, for example, a matrix number of 256×256.

In addition, the second file device 15 integrates data for each voxel of 31p spectroscopy in the frequency direction, which can be searched using the subject identification number and imaging date as an index, as shown in the data structure shown in FIG. It is possible to store a plurality of phosphorus density distribution images SI.

Here, the phosphorus density distribution image Sl has, for example, a matrix number of 4×4, 16×16, etc., and is shown as a 4×4 matrix in the figure.

Note that a common grid (4×4 in the illustration) is attached to both images P1 and SI, and both images P I l
When an ROI is set in either of the images and Sl, the ROI is set in the corresponding grid of the other image.

Furthermore, the third file device 16 can store a plurality of 31P spectrum images that can be searched using ROl as an index, as shown in the data structure shown in FIG.

Then, the controller 17 calls up the above-mentioned images under the control of the computer 10, the console 12, and the mouse device 13, and multi-displays them on the monitor 11.

In addition to the density distribution image Sl, the proton image Pit with high spatial resolution is displayed simultaneously, and the ROIk set for both images is linked to both images, so when setting the region of the spectrum image SP ROIk, can perform setting operations by referring to the proton image PI with high spatial resolution, and can also perform setting operations by directly referring to SI, so that the spectrum image 5PRoIk for the desired region is displayed. It is something that can be done.

Moreover, as shown in FIG. 6, the spectrum image S P R
Multiple peaks for OIk (beak p, ,
p2), for example, the 31P density distribution image Sl
, , Sl, may be displayed.

Note that in the above example, 31P is illustrated, but
It can also be applied to other nuclides.

In addition, various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, in the present invention, tomographic image information regarding protons,
It has a file device that stores spectroscopic image information and spectrum information regarding at least one atomic nucleus other than the proton, and the spectrum information is commonly attached to the tomographic image information and the spectroscopic information. By searching for the region of interest, when setting the region where you want to display the spectrum, you can set it to the desired region by using tomographic image information related to protons, which is an image with high spatial resolution, and avoid errors. This makes functional diagnosis possible and easy.

Therefore, according to the present invention, it is possible to easily set a region in which a spectrum is desired to be displayed, and to provide a magnetic resonance diagnostic apparatus that enables and facilitates error-free functional diagnosis.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the magnetic resonance diagnostic apparatus according to the present invention, and FIGS. 2 to 4 are diagrams showing the data structure of information to be filed in the magnetic resonance diagnostic apparatus of this embodiment. , FIG. 5 is a diagram showing an example of display in the magnetic resonance diagnostic apparatus of this embodiment, FIG. 6 is a diagram showing another example of display in the magnetic resonance diagnostic apparatus of this embodiment, and FIG. 7 is a diagram of a conventional example. It is a figure which shows an example. This is a diagram. MA... Magnet assembly, l... Static magnetic field coil, 2... Gradient magnetic field generation coil for x, y, and z axes, 3
...Probe, 4...Transmitter, 5...Receiver, 6
...X-axis gradient magnetic field power supply (GXA), 7...Y-axis gradient magnetic field power supply (GYA), 8...Z-axis gradient magnetic field power supply (
G Z A), 9...Sequencer, 10...Computer, 11...Monitor, 12...Console, 1
3... Mouse device (or trackball device), 14
...first file device, 15...second file device, 16...third file device, 17...controller.

Claims (1)

[Claims] A magnetic resonance diagnostic apparatus that generates a magnetic resonance phenomenon involving one or more atomic nuclei in a specific part of a subject, collects magnetic resonance signals generated by the phenomenon, and generates and displays diagnostic information based on magnetic resonance parameters, tomographic image information regarding protons, spectroscopic image information regarding at least one nucleus other than the protons;
and a file device for storing spectrum information, and the spectrum information is searched for a region of interest commonly attached to the tomographic image information and the spectroscopic information.