# US 7,746,070 B2 · Method for generating high resolution MRI image and recording medium thereof

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- Number: US 7,746,070 B2
- Document ID: US7746070B2
- Status: Granted
- Kind: B2
- Application number: 11/782,504
- Filed: 2007-07-24
- Published: 2008-12-18
- Granted: 2010-06-29
- Earliest claimed: 2007-06-15
- Assignees: Korea Advanced Institute of Science and Technology
- Inventors: Hyun Wook Park; Seong Dae Yun
- Web page: https://patentgrep.com/patent/US7746070B2

## CPC

- G01R 33/5611: {Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE (structural details of arrays of sub-coils G01R33/3415)}
- G01R 33/4806: {Functional imaging of brain activation}
- G01R 33/482: {using a Cartesian trajectory}
- G01R 33/5608: {Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels (image data processing or generation, in general G06T)}
- G01R 33/5619: {by temporal sharing of data, e.g. keyhole, block regional interpolation scheme for k-Space [BRISK]}
- G01R 33/56308: {Characterization of motion or flow; Dynamic imaging}
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

The present invention relates to a high-resolution magnetic resonance imaging (MRI) image generating method using a new MRI image method called a generalized series parallel imaging technique, and a recording medium thereof. In the high-resolution MRI image generating method using the generalized series parallel imaging technique according to the present invention, selecting only a predetermined low frequency band of all frequency bands, and sampling the predetermined low frequency band of all frequency bands at a lower rate than a Nyquist rate to acquire magnetic resonance data.

## Claims

### Claim 1

A method for generating a high-resolution magnetic resonance imaging (MRI) image on a display device by using a generalized series parallel imaging method, the method comprising the steps of:
selecting only a predetermine low frequency band of all frequency bands;
sampling the predetermine low frequency band of all frequency bands at a lower rate than a Nyquist rate to acquire magnetic resonance data; and
producing on the display device a final MRI image that is generated using the magnetic resonance data.

### Claim 2 (depends on 1)

The method of claim 1, wherein the method of sampling is a SPACE RIP (sensitivity profiles from an array of coils for encoding and reconstruction in parallel) sampling method.

### Claim 3 (depends on 1)

The method of claim 1, wherein the step of producing the final MRI image comprises:
generating an intermediate MRI image by reconstructing the magnetic resonance data with a reconstruction method of a generalized series imaging technique; and
generating the final MRI image, in which the magnetic resonance data has been reconstructed, by reconstructing the intermediate MRI image with a reconstruction method of a parallel imaging technique.

### Claim 4 (depends on 3)

The method of claim 3, wherein the step of generating the intermediate MRI image comprises a regularization method.

### Claim 5 (depends on 3)

The method of claim 3, wherein the step of generating the final MRI image comprises a regularization method.

### Claim 6 (depends on 3)

The method of claim 3, wherein the reconstruction method of the parallel imaging technique is a SPACE RIP reconstruction method.

### Claim 7

A computer readable recording medium implemented with a program for executing a high-resolution MRI generating method that produces a high-resolution MRI image on a display device by using a generalized series parallel imaging method, the high-resolution MRI image generating method comprising the steps of:
selecting only a predetermined low frequency band of all frequency bands; and
sampling the predetermined low frequency band of all frequency bands at a lower rate than a Nyquist rate to acquire magnetic resonance data.

### Claim 8 (depends on 7)

The compute readable recording medium of claim 7, wherein the method of sampling is a SPACE RIP (sensitivity profiles from an array of coils for encoding and reconstruction in parallel) sampling method.

### Claim 9 (depends on 7)

The computer readable recording medium of claim 7, further comprising the steps of:
generating an intermediate MRI image by reconstructing the magnetic resonance data with a reconstruction method of a generalized series imaging technique; and
generating a final MRI image, in which the magnetic resonance data has been reconstructed, by reconstructing the intermediate MRI image with a reconstruction method of a parallel imaging technique.

### Claim 10 (depends on 9)

The computer readable recording medium of claim 9, wherein the step of generating the intermediate MRI image comprises a regularization method.

### Claim 11 (depends on 9)

The computer readable recording medium of claim 9, wherein the step of generating the final MRI image comprises a regularization method.

### Claim 12 (depends on 9)

The computer readable recording medium of claim 9, wherein the reconstruction method of the parallel imaging technique is a SPACE RIP reconstruction method.