JP2002095645A - Magnetic resonance imaging device and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce burden on a subject by shortening time for the whole process of an examination through reducing time spent on setting a parameter and a position for an image region or on reading or analyzing images and by improving a throughput for a patient. SOLUTION: A sample image stored in a computer system 15 is displayed on an imaging display 19 for each of the steps in which setting a parameter and a position for an image region, or reading and analyzing the images are done.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic resonance imaging apparatus and a storage medium used for the apparatus.

[0002]

2. Description of the Related Art In recent years, as one of medical devices, a magnetic resonance imaging apparatus (hereinafter referred to as an MRI) using a magnetic resonance imaging method.
Has become popular. As is well known, magnetic resonance imaging is performed at a specific frequency (resonance frequency) according to a characteristic magnetic moment and a magnetic field intensity when a group of magnetization spins of a target nucleus is placed in a magnetic field. This is a technique for acquiring chemical and physical microscopic information of a substance by utilizing a phenomenon that resonates with a rotating high-frequency magnetic field and generates a signal (magnetic resonance signal) in a relaxation process. In magnetic resonance imaging, image contrast and resolution, image S / N
The ratio or the photographing time is, for example, the type of pulse sequence and its parameter such as repetition time (TR),
It depends on the echo time (TE), the flip angle (FA) of the high-frequency magnetic field pulse for excitation, etc.
MRI, such as the number of matrices, requires setting of particularly large imaging conditions among medical devices. Conventionally, the parameters of these pulse sequences are set to arbitrary values based on the experience of the operator, or by selecting appropriate parameter values from typical parameter values built into the device itself. Settings were being made.

[0003] Further, when the affected part or lesion to be imaged is not specific to the subject, and when it is desired to find an abnormal site by a generally known inspection method, a typical typical method unique to the inspection method is used. There may be a shooting area. For example, three-dimensional time of flight (3D-TOF) imaging of blood vessels in the head and abdominal bile ducts in MR Cholangiopancreato
This is the case when shooting is performed by the graphy (MRCP) method. Conventionally, in such an examination method, the position of the imaging region has been set empirically by searching for images or films of another clinical example taken in the past and referring to this. Further, as described above, in the MRI apparatus, images having various contrasts can be obtained depending on imaging conditions such as an imaging region and parameters. In the related art, generally, an image captured in the past is referred to, The MRI images have been understood and evaluated with reference to a collection of images on paper, such as a human body atlas, in which the respective parts are imaged and representing the positional relationship of each organ.

[0004]

However, as described above, if the parameters of the pulse sequence are not set to appropriate values, the contrast, resolution, and S / N ratio required for the target diagnosis can be obtained. On the other hand, it is difficult for an inexperienced operator to imagine what image is actually obtained by setting each parameter. In addition, even when an appropriate parameter value is selected from typical parameter values, depending on the selected parameter value,
It is difficult to know in advance what image will be obtained. Further, when it is desired to change some values of the parameters due to the shortening of the photographing time, the size of the photographing target, or the like, it is difficult to predict the influence of those changes on the image. Similarly, in setting the position of the imaging region in each inspection method, what kind of image can be obtained by actually setting the position of the imaging region,
For inexperienced operators it was difficult to predict. Further, even in the captured image, it is difficult for an operator who is not familiar with the MRI image to understand how each organ is imaged, which may affect the evaluation of the image.

[0005] Along with the difficulty in setting these parameters, setting the position of the imaging region, and understanding and evaluating the captured image, the examination time is prolonged, the patient throughput is reduced, and the burden on the subject is increased. Caused serious problems. It is therefore an object of the present invention to provide a magnetic resonance imaging apparatus that solves the above-mentioned problems, shortens the entire examination time, improves patient throughput, and reduces the burden on the subject, and a storage medium used in the apparatus.

[0006]

According to a first aspect of the present invention, there is provided a computer-readable storage medium storing a program for operating a computer, wherein the program comprises a magnetic resonance imaging apparatus. A step of causing the operator to search for at least one sample image suitable for the imaging condition input from the plurality of sample images respectively corresponding to the imaging conditions, and the sample image searched for by the procedure in the magnetic resonance imaging apparatus. And displaying the image on the image display means. According to a fourth aspect of the present invention, there is provided a computer-readable storage medium storing a program for operating a computer, wherein the program reads an operator from a plurality of sample images respectively corresponding to imaging conditions of the magnetic resonance imaging apparatus. Searching for at least one sample image suitable for the imaging condition input to the MRI, displaying the sample image searched for in the image display means in the magnetic resonance imaging apparatus, and displaying the displayed sample image And displaying the information of each part of the sample image on the image display means. According to a sixth aspect of the present invention, there is provided a computer-readable storage medium storing a program for operating a computer, wherein the program reads an operator from a plurality of sample images respectively corresponding to imaging conditions of the magnetic resonance imaging apparatus. A step of searching for at least one sample image suitable for a shooting condition closest to the shooting condition input to the above, a step of calculating a sample image suitable for the shooting condition from the sample images searched by the procedure, Displaying the sample image thus obtained on an image display means of the magnetic resonance imaging apparatus.

According to a seventh aspect of the present invention, an imaging condition of the magnetic resonance imaging apparatus and a sample image which is an image taken under each of the imaging conditions are stored. According to a ninth aspect of the present invention, a plurality of sample images respectively corresponding to imaging conditions of a magnetic resonance imaging apparatus, and at least one sample suitable for an imaging condition input to an operator from the plurality of sample images. A program including a procedure for causing a computer to search for an image and a procedure for displaying the sample image searched for in the procedure on an image display unit of the magnetic resonance imaging apparatus is stored. The invention according to claim 10 is
Magnetic field generating means for generating a magnetic field in an imaging space, control means for controlling the magnetic field generating means under imaging conditions input by an operator, and reproduction of an image of the subject based on signals acquired from the imaging space. Reconstruction means for performing configuration, sample image storage means for storing sample images, search means for searching for sample images from the sample image storage means based on shooting conditions input by the operator, Image display means for displaying at least one of the sampled image and the reconstructed image.

According to a twelfth aspect of the present invention, there is provided a magnetic field generating means for generating a magnetic field in a photographing space, a control means for controlling the magnetic field generating means according to photographing conditions inputted by an operator, and Reconstructing means for reconstructing an image of a subject based on signals obtained from a space; sample image storage means in which a sample image is stored; and the sample image based on imaging conditions input by the operator. Search means for searching the sample image from the storage means;
Means for calculating a sample image suitable for the shooting conditions from the searched sample image, and image display means for displaying at least one of the calculated sample image and the reconstructed image. It is characterized by doing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment according to the present invention will be described in detail with reference to the drawings. FIG.
Shows the configuration of the MRI according to the present embodiment. A gantry 1 in which a cylindrical internal space is formed so as to accommodate a subject is equipped with a static magnetic field magnet 3, a gradient magnetic field coil 5, and an RF coil 7, and a system for controlling each device mounted on the gantry 1 , Gradient power supply 9, transmission unit 11, reception unit 1
3, computer system 15, image display 1
9, a sequence controller 17, and a console 2. The static magnetic field magnet 3 generates a static magnetic field inside the cylinder substantially parallel to the Z axis. The Z axis coincides with the longitudinal center line of the cylinder. The gradient coil 5 has an X-axis gradient magnetic field in which the magnetic field intensity changes linearly along the X-axis, a Y-axis gradient magnetic field in which the magnetic field intensity changes linearly along the Y-axis, and a linear magnetic field intensity along the Z-axis. It is configured such that the changing Z-axis gradient magnetic field can be generated independently. Note that the X axis is horizontal and Y
The axis is vertical. The RF coil 7 generates a high-frequency pulse for excitation having a flip angle of, for example, 90 ° for exciting protons in the subject, and has a flip angle of, for example, 180 ° for inverting protons in the subject. Generate a pulse.

The gradient power supply 9 generates an X-axis driving current for generating an X-axis gradient magnetic field from the gradient coil 5, a Y-axis driving current for generating a Y-axis gradient magnetic field, and a Z-axis gradient magnetic field. Are supplied to the gradient coil 5 independently of each other. The transmission unit 11 is configured to be able to supply a high-frequency current for generating high-frequency pulses for excitation and inversion (hereinafter sometimes referred to as RF pulses) from the RF coil 7. The RF coil 7 is also used as a receiving coil for receiving an echo generated from protons in the subject. The receiving unit 13 samples the echo signal received via the RF coil 7, performs A / D conversion, and outputs the result to the computer system 15 as a digital signal. After appropriately correcting the echo signal from the receiving unit 13, the computer system 15 reconstructs image data by, for example, two-dimensional Fourier transform processing (2DFT). The image data is sent to the image display 19 and visualized. The sequence controller 17 includes a gradient magnetic field power supply 9, a transmission unit 11, and a reception unit 1 according to the pulse sequence data sent from the computer system 15.
3 to execute a pulse sequence.

The console 2 is a computer system 1
5 and an input device capable of setting various conditions and inputting commands, such as a keyboard and a mouse. Here, the computer system 15 will be described in detail. The computer system 15 is used for reconstructing the image data as described above. In the present embodiment, the computer system 15 is also used for providing a typical example of a sample image. FIG. 2 shows a block diagram of a portion of a computer system 15 for providing sample images. Note that a block diagram relating to image reconstruction is omitted here. A system for providing a sample image includes a memory 71 for temporarily storing information, a sample image memory 73 used for setting parameters, a sample image memory 74 used for setting a shooting area, and a shot image. Image memory 75 used for understanding and evaluating the data, a setting memory 77 in which imaging regions, types of sequences and parameter values corresponding to the types of sequences are stored, a CPU 72 for controlling these, and controls for these It comprises a memory 76 in which programs are stored. Each sample image memory and control program storage memory is a storage medium such as a hard disk, a DVD, and a CD-ROM. In FIG. 2, each sample image memory, control program storage memory, and setting memory are used. Are individually displayed, but these may be one storage medium.

When each sample image and the control program are stored in advance in the hard disk or the like of the apparatus main body at the time of shipment of the apparatus, the operator does not need to particularly perform installation and the like, but these are shipped. If the device itself is supplied separately on DVD, CD-ROM, etc.,
The operator needs to install a program or a sample image from a storage medium such as a DVD or a CD-ROM into a storage medium such as a hard disk. At this time, the program stored in a hard disk or the like in the main body of the apparatus before installation is partially rewritten. It is not necessary to install all the sample images and programs, and it is also possible to install only necessary sample images, for example, only sample images used for understanding and evaluating a captured image. The operator may select which sample image is to be installed. Alternatively, only the control program may be installed on a hard disk or the like in the apparatus, and each sample image may be read from a storage medium such as a DVD or a CD-ROM as needed. Further, it is also possible to store the sample images in a server and read out the sample images as needed through a network.

When a new type of pulse sequence is installed and added to the apparatus main unit, the parameter value of the pulse sequence changes according to the type of pulse sequence. When the values and the sample images corresponding to the values are stored in one storage medium, the installation can be performed more efficiently than when each is separately installed in the apparatus main body. In addition, even if the storage medium is not necessarily one storage medium, even in a case where a plurality of CD-ROMs or the like are supplied at one time in one transaction, installation can be performed more efficiently.
Next, an operation in the case of performing imaging of a subject using the above-described MRI will be described. The operator first sets the parameters of the pulse sequence during imaging. The parameters are set by inputting necessary parameters through the console 2 while observing the screen displayed on the image display 19. Here, an operation flowchart performed by the operator from imaging using MRI to image evaluation according to the present embodiment is shown in FIG. The operator selects either a sample mode for displaying a sample image or a conventional mode without a sample image from a state in which the apparatus main body is turned on. When the conventional mode is selected, no sample image is displayed.

On the other hand, when the operator selects the sample mode, first, in step 21, the imaging part of the subject is determined. Here, the imaging part is, for example, the head of the subject,
It represents a large classification such as the chest and abdomen. In addition,
The type of the imaging part is stored in the setting memory 77 in advance. The selection of the imaging region is performed by looking at a screen displayed on the image display 19, for example, a screen as shown in FIG.
This can be performed by clicking with the console 2, for example, a mouse. In FIG. 4, the head, the neck, the chest, the abdomen, the pelvis, the lower limb, the upper limb, and the like are classified. In the present embodiment, the case where the head (shown by hatching) is selected explain. To determine the region to be imaged, the user proceeds to step 22 in FIG. 3 by clicking the “Next” button shown at the lower right of the screen with a mouse or the like. Here, in FIG. 2, selection of an imaging part and “next”
By clicking the button, information on the selected imaging region and information indicating that the process proceeds to the next step are stored in the memory 71 from the console 2 via the CPU 72. Step 22 is a step of setting the type of the pulse sequence.
9 displays, for example, the screen shown in FIG. The type of the pulse sequence is stored in the setting memory 77 in advance.

In the screen shown in FIG. 5, several types of pulse sequences are shown in the central region. The types of pulse sequences include the SE method (spin echo) and F
E method (field echo), FSE method (fast spin echo), E
The PI method (echo planar imaging) is displayed.
The operator selects any one of the above pulse sequences with a mouse or the like and clicks a “next” button to move to step 23. Here, in FIG. 2, the selection of the type of the pulse sequence and the "next"
By clicking the button, the type of the pulse sequence and information indicating that the process proceeds to the next step are stored in the memory 71 from the console 2 via the CPU 72. In the present embodiment, the above four types of pulse sequences have been described as examples.
The RA method or the like may be used as an option, and the type of pulse sequence is not particularly limited. Step 2
Step 3 is a step of setting the parameters of the pulse sequence. At this time, for example, a screen shown in FIG. The parameters of the pulse sequence are stored in advance in the setting memory 77 in association with the types of the above parameters.
The screen shown in FIG. 6 includes an upper area where a sample image is displayed, and a lower area where a pulse sequence parameter table is displayed.

The parameter table is a table in which combinations of parameter values in typical recommended photographing are displayed in a plurality of rows.
It is stored in advance in a storage medium such as a hard disk of the apparatus main body. In step 22, the type of the pulse sequence stored in the memory 71 is the same as that in step 23
And the parameters corresponding to the type of pulse sequence are automatically displayed. In the present embodiment, a combination of four parameter values is displayed, and the parameters include a repetition time (TR), an echo time (TE), a flip angle (FA) of a high-frequency magnetic field pulse for excitation, and a slice thickness ( ST), the size of the shooting area (FOV), the number of matrices (MTX), and the total number of shootings (NEX). In addition, the parameter table has a configuration in which, for example, four types of combinations of the above-described parameter values can be selected. In the present embodiment, the combination of the parameter values in the third column from the upper part of the screen indicated by hatching, = 2000msec, TE = 120msec, FA =
90grad, ST = 6mm, FOV = 22cm, MTX = 25
6 × 256 and NEX = 2 are selected. Note that the number of selectable parameter value combinations is not particularly limited.

When the "sample" button at the lower right of the screen is clicked in a state where the combination of the parameter values as described above is selected with a mouse or the like, the information that the process proceeds to the step stored in the memory 71 in FIG. Based on the current step, the current step is recognized, the corresponding sample image memory, here, the parameter setting sample image memory 73 is selected, and the information of the imaging part stored in the memory 71 and the selected parameter value are stored. According to the combination information, the corresponding sample image is read from the parameter setting sample image memory 73,
The sample image is displayed in the area of the image display 19 where the sample image is displayed. Although the sample image shown in FIG. 6 shows a tomographic image of one axial plane, a tomographic image of a plurality of planes such as an axial plane, a coronal plane, and a sagittal plane can be displayed simultaneously. It may be good, or may be appropriately selectable.
Alternatively, different sample images based on combinations of different parameter values may be simultaneously displayed. In this case, the sample images can be displayed on the same screen, and it is possible to determine which parameter value to use by comparing the sample images.

As described above, the operator can select one row of the parameter table and click the "sample" button with the mouse to display the same or different sample images any number of times. Refer to and determine the parameters. Also, in the combination of parameter values in typical recommended shooting shown in the parameter table,
When it is difficult to perform appropriate photographing, some of the combinations of the parameter values may be changed. For example, as described above, among the combinations of the parameter values in the third row from the upper row, from TE = 100 msec, TR = 1
It can be changed to 50 msec. The changing method is performed by, for example, double-clicking a portion to be changed in the sample table and inputting a numerical value using a keyboard or the like. The sample image at this time may be TE = 150 msec and may be stored in advance in the parameter setting sample image memory 73, or may be calculated from the stored sample image. . For example, TE =
TE = 100ms when there is no 150msec sample image
The sample image of ec and the sample image of TE = 200 msec are read, and based on these sample images, TE = 1
Calculate a sample image when shooting at 50 msec,
indicate.

Here, for example, when SE is selected as the type of pulse sequence in step 22 described above, the pixel value of a certain pixel of the MR image in the SE method is S = ρ · exp (−TE / T2) · ( 1-exp (-TR / T1)). Here, S is a pixel value, ρ is a hydrogen nucleus density, T1 is a longitudinal relaxation time, T2 is a transverse relaxation time, and TE and TR represent an echo time and a repetition time as described above.
Therefore, two images differing only in TE, in the above example T
E = 100 msec (this is assumed to be TE1) and TE = 20
The ratio between the pixel values S1 and S2 at each of 0 msec (this is temporarily referred to as TE2) is S1 / S2 = (ρexp (-TE1 / T2) ・ (1-exp (-TR / T1)) } /
{ρexp (-TE2 / T2) ・ (1-exp (-TR / T1))} = exp ((T
E2-TE1) / T2), from which T2 = (TE2-TE1) / ln (S1 / S2). Here, TE to be calculated = 150
The pixel value S3 in the case of msec (this is assumed to be TE3) is S2
S3 = S2exp ((TE2-TE3) / T2), and substituting the above T2 into this, S3 = S2exp [{(TE2-TE3) / (TE2-TE1)} S1 / S2)], and by performing this for all the pixels, even if there is no sample image that matches the shooting conditions input by the operator, the sample image is stored based on the sample images stored in the sample image memory in advance. Can be calculated. In the present embodiment, the calculation of the sample image when the SE method is mainly used has been described. However, the calculation method according to each pulse sequence is included in the program for other types of pulse sequences. By leaving
Can be calculated. The newly created sample image (S3 in the above example) may be stored in a writable memory, for example, a DVD-RAM, CD-R, hard disk, or the like. Further, regarding the storage, it is preferable to determine whether or not to store the data according to the selection of the operator.

As described above, by referring to the sample image searched or calculated, if an appropriate combination of parameter values is found, a "next" button is clicked, and FIG.
To step 24 in. By clicking the "next" button, the information in FIG. 2 that the process proceeds to the next step on the memory 71 is updated. In addition, when the "return" button shown in FIG. 6 is clicked,
Returning to the screen shown in FIG. 4, the imaging region can be selected again. Step 24 is a step of setting the position of the photographing area. At this time, for example, a screen shown in FIG. 7 is displayed on the image display 19. The screen shown in FIG. 7 is provided with a region where an image for adjusting the position of the actual photographing region is displayed substantially at the left side of the center, and a region where a sample image is displayed at the substantially right side of the center.
It should be noted that the image shown in the approximate center left part of FIG. 7 is generally called a positioning image, and a position frame (indicated by a thick line) in the positioning image is a region to be photographed. Is represented. Here, similarly to the above, when the “sample” button is clicked, based on the information on the selected imaging region stored in the memory 71 and the information on transition to the next step, the sample image memory 74 for setting the imaging region is used. , The corresponding sample image is read and displayed. In the present embodiment, a typical imaging area when imaging a blood vessel of the head by the 3D-TOF method is shown as a sample image. The example shown (multi-slice) may be used.

The operator refers to this sample image and
The position frame displayed in the scanogram for adjusting the position of the shooting area is determined by a keyboard, a mouse, or the like in the console 2. When the photographing area is determined, the “photographing start” button is clicked, and the process proceeds to step 25 in FIG. By clicking on the “start photographing” button, the transition information to the next step on the memory 71 is updated. When the "return" button shown in FIG. 7 is clicked, the screen returns to the screen shown in FIG. 4 or FIG. 6, and it is possible to select an imaging region or a combination of parameter values again. Step 2
5, as described above, each magnetic field is applied to the subject from each coil via the sequence controller 17, the gradient magnetic field power supply 9, and the transmitting unit 11 from the computer system 15 in FIG. 1, and information on the subject is received by the receiving unit 13. Through the computer system 15. When the photographing in step 25 is completed, in step 26, the photographed image is displayed. Step 26 is a step in which the captured image is displayed, and the operator understands and evaluates the image while observing the image. The image display 19 displays, for example, a screen shown in FIG.

The screen shown in FIG. 8 has a region where a photographed image of the subject actually photographed is displayed at a substantially central left portion, a region where a sample image is displayed at a substantially central right portion, and further a sample image is displayed. A region for displaying information in the sample image is provided above the region to be displayed. The image of the subject photographed in step 25 is automatically displayed in a substantially left area at the center. Here, similarly to the above, when the “sample” button is clicked, based on the information on the selected imaging part stored in the memory 71 and the transition information to the next step, the sample image memory 75 for evaluation of the captured image is used. , The corresponding sample image is read and displayed. The sample image is numbered at each location, and information corresponding to each number is displayed in the upper area. The sample image may be an image photographed by MRI or an image that is not an actual photographed image, for example, an image created by computer graphics (generally called a CG image). good.
In the present embodiment, the medulla, caudate nucleus, thalamus, corpus callosum, and lateral ventricle are shown as information of each location. In addition,
In the case of a sample image showing a plurality of organs, for example, in the case of a sample image of the abdomen, for each organ, liver, gallbladder,
The name of an organ such as the stomach may be indicated.

The operator refers to the information of each of the above locations, and
As soon as the understanding and evaluation of the image are completed, the “photographing end” button is clicked to terminate the photographing and evaluation. According to the present embodiment, by displaying a sample image in the parameter setting step 23, it is possible to know in advance what kind of contrast, resolution, and S / N ratio can be obtained by the combination of each parameter value. it can. In addition, by displaying the sample image in step 24 for setting the position of the imaging region, it is possible to know in advance what kind of image can be obtained in setting the position of the imaging region in each inspection method. Furthermore, in the step 26 of evaluating the captured image, it is possible to understand how the respective locations of the imaging of the subject are arranged, and it is possible to easily evaluate the image. Note that if the sample image is displayed in all of the steps 23, 24, and 26, shooting and evaluation can be performed more effectively. However, it is sufficient that the sample image is used in at least one step. The configuration may be such that the sample image is displayed only in step 23 and the sample image cannot be displayed in the other steps 24 and 26.

In this embodiment, the sample image is displayed using the "sample" button. However, the sample image may be automatically displayed at the same time as the selection. The size of each display area on the screen is not particularly limited. Further, in the present embodiment, there may be a case where there is no sample image. This is, for example, in the case of shooting with the latest pulse sequence or the like, the sample image by the latest pulse sequence is stored in a storage medium such as a hard disk in the device, or
Or, if it does not exist on the storage medium such as the DVD,
An error display may be performed. Further, in the present embodiment, the case where each sample image or the control program is installed on the hard disk or the like in the apparatus main body has been described, but it is not particularly in the apparatus but in the personal computer (called PC). It may be possible to install it. In this case, the operator can view each sample image regardless of the imaging, even in the case where the user does not own the magnetic resonance apparatus main body. Very effective.

[0025]

As described in detail above, according to the present invention, when setting a parameter or setting a position of a photographing area, when displaying a sample image, the operator can use any image. Can be obtained beforehand,
It is possible to easily set parameters and the position of the photographing area, and to shorten the photographing time. In addition, when a sample image is displayed when evaluating a photographed image, the positional relationship of each part of the photographed image can be easily understood, so that it is possible to shorten the time for understanding and evaluating the image. It is. Therefore, as described above, according to the present invention, the entire examination time can be shortened, the patient throughput can be improved, and the burden on the subject can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a magnetic resonance imaging apparatus according to a first embodiment of the present invention.

FIG. 2 is a system block diagram for providing a sample image according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart of an operation performed by the operator from photographing to image evaluation using the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

FIG. 4 is a display diagram of an image display at the time of selecting an imaging region in the first embodiment according to the present invention.

FIG. 5 is a display diagram of an image display when a parameter type is selected according to the first embodiment of the present invention.

FIG. 6 is a display diagram of an image display at the time of setting parameters of a pulse sequence according to the first embodiment of the present invention.

FIG. 7 is a display diagram of an image display at the time of setting a position of a shooting area in the first embodiment according to the present invention.

FIG. 8 is a display diagram of an image display at the time of evaluation of a captured image according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gantry 2 Console 3 Static magnetic field magnet 5 Gradient magnetic field coil 7 RF coil 9 Gradient magnetic field power supply 11 Transmitting unit 13 Receiving unit 15 Computer system 17 Sequence controller 19 Image display 71 Memory 72 CPU 73 Parameter setting sample image memory 74 For imaging area setting Sample image memory 75 Sample image memory for evaluation of photographed image 76 Memory for storing control program 77 Setting memory

Claims (12)

[Claims] 1. A computer-readable storage medium storing a program for operating a computer,
The program includes a step of causing an operator to search for at least one sample image suitable for an imaging condition input from a plurality of sample images respectively corresponding to imaging conditions of a magnetic resonance imaging apparatus, and a sample searched by the procedure. Displaying an image on an image display means of the magnetic resonance imaging apparatus. 2. The search procedure according to claim 1, wherein at least one of the imaging conditions is set based on an imaging region setting condition.
2. The storage medium according to claim 1, wherein said sample image is searched. 3. The storage according to claim 1, wherein in the searching step, the sample image is searched based on at least a setting condition of a parameter used in a pulse sequence which is one of the imaging conditions. Medium. 4. A computer-readable storage medium storing a program for operating a computer,
The program includes a step of causing an operator to search for at least one sample image suitable for an imaging condition input from a plurality of sample images respectively corresponding to imaging conditions of a magnetic resonance imaging apparatus, and a sample searched by the procedure. A step of displaying an image on an image display unit of the magnetic resonance imaging apparatus, and a step of displaying information of each part of the sample image on the image display unit together with the displayed sample image. Storage medium. 5. The step of displaying the information of each location,
5. The storage medium according to claim 4, further comprising a step of displaying information on a name of an organ shown in said sample image on said image display means. 6. A computer-readable storage medium storing a program for operating a computer,
A step of causing the operator to search at least one sample image suitable for an imaging condition closest to the input imaging condition from a plurality of sample images respectively corresponding to the imaging conditions of the magnetic resonance imaging apparatus; and A program for calculating a sample image suitable for the imaging condition from the sample image retrieved by the method, and a procedure for displaying the calculated sample image on an image display unit of the magnetic resonance imaging apparatus. A storage medium characterized by the following. 7. A storage medium storing imaging conditions of a magnetic resonance imaging apparatus and a sample image which is an image captured under each of the imaging conditions. 8. The storage medium according to claim 7, wherein the imaging condition is at least one of an imaging region setting condition and a parameter setting condition used in a pulse sequence. 9. A plurality of sample images respectively corresponding to the imaging conditions of the magnetic resonance imaging apparatus, and the computer searches the computer for at least one sample image suitable for the input imaging conditions from the plurality of sample images. A storage medium storing a program including a procedure and a procedure for displaying a sample image retrieved by the procedure on an image display unit of the magnetic resonance imaging apparatus. 10. A magnetic field generating means for generating a magnetic field in a photographing space, a control means for controlling the magnetic field generating means under photographing conditions inputted by an operator, and a magnetic field generating device based on a signal acquired from the photographing space. A reconstructing unit for reconstructing an image of a sample, a sample image storing unit storing a sample image, and a search for retrieving a sample image from the sample image storing unit based on an imaging condition input by the operator A magnetic resonance imaging apparatus comprising: means for displaying at least one of the retrieved sample image and the reconstructed image. 11. The magnetic resonance imaging apparatus according to claim 10, wherein the imaging condition is at least one of an imaging region setting condition and a parameter setting condition used in a pulse sequence. 12. A magnetic field generating means for generating a magnetic field in a photographing space, a control means for controlling the magnetic field generating means under photographing conditions inputted by an operator, and a magnetic field generating device based on a signal acquired from the photographing space. A reconstructing unit for reconstructing an image of a sample, a sample image storing unit storing a sample image, and a search for retrieving a sample image from the sample image storing unit based on an imaging condition input by the operator Means, a means for calculating a sample image suitable for the imaging condition from the searched sample image, and an image display means for displaying at least one of the calculated sample image and the reconstructed image. A magnetic resonance imaging apparatus comprising: