JP2012010897A5

JP2012010897A5 -

Info

Publication number: JP2012010897A5
Application number: JP2010149519A
Authority: JP
Filing date: 2010-06-30
Publication date: 2012-07-19
Anticipated expiration: 2030-06-30

Claims

A magnetic resonance imaging apparatus for collecting k-space data of a predetermined part displaced by body movement of a subject by dividing it into a plurality of scans,
In the first scan of the plurality of scans, predetermined data in the first correction k space and data in the first region in the image k space are collected,
In a second scan of the plurality of scans, predetermined data in the second correction k space and data in the second region of the image k space are collected,
Wherein the predetermined data of the first correction k space, based on the predetermined data of the second correction k space, at least one of the first and second regions of the image for k-space Correction means for correcting data in one of the areas;
Reconstructing means for reconstructing the image of the predetermined part using the image k-space data corrected by the correcting means;
A magnetic resonance imaging apparatus.

The magnetic resonance imaging apparatus according to claim 1, wherein the correction unit includes an intensity correction unit that corrects the intensity of data in the at least one region.

The intensity correction unit, given the the intensity of the predetermined data of the first said collected by scanning the first correction k space, the second said collected by scanning the second correction k-space The magnetic resonance imaging apparatus according to claim 2, wherein the intensity of data in the at least one region is corrected based on the intensity of the data.

The magnetic resonance imaging apparatus according to claim 1, wherein the correction unit includes a phase correction unit that corrects a phase of data in the at least one region.

Wherein the phase correcting means, a predetermined said phase of a predetermined data of the first said collected by scanning the first correction k space, the second said collected by scanning the second correction k-space The magnetic resonance imaging apparatus according to claim 4, wherein the phase of the data in the at least one region is corrected based on a difference from the data phase.

The magnetic resonance imaging apparatus according to claim 4, wherein the phase correction unit corrects the phase after the intensity of data in the at least one region is corrected.

The first correction k space, the second correction k space, and the image k space are two-dimensional k-space or three-dimensional k-space, respectively. The magnetic resonance imaging apparatus described in 1.

A magnetic resonance imaging apparatus that collects k-space data of a predetermined part displaced by body movement of a subject by dividing it into a plurality of scans using 3D pulse sequences,
In the first scan among the plurality of scans, data on a first straight line extending in the kz direction across a predetermined position in the first correction k space, and the first region in the image k space Collect data and
In the second scan of the plurality of scans, the data on the second straight line extending in the kz direction across a predetermined position in the second correction k space, and the second scan in the image k space. Gather data and data for the area,
An inverse Fourier transform means for performing an inverse Fourier transform in the kz direction on the data on the first line, the data on the second line, the data on the first area, and the data on the second area;
First correction data obtained by performing inverse Fourier transform on the data on the first straight line, and second correction data obtained by performing inverse Fourier transform on the data on the second straight line Based on the above, the first image data obtained by performing the inverse Fourier transform on the data in the first region and the second data obtained by performing the inverse Fourier transform on the data in the second region Correction means for correcting at least one of the image data and the image data;
Reconstructing means for reconstructing the image of the predetermined part using the image data corrected by the correcting means;
A magnetic resonance imaging apparatus.

The magnetic resonance imaging apparatus according to claim 8, wherein the correction unit includes an intensity correction unit that corrects the intensity of the at least one image data.

The intensity correction means corrects the intensity of at least one of the image data based on the intensity of the first correction data and the intensity of the second correction data. The magnetic resonance imaging apparatus described.

The magnetic resonance imaging apparatus according to claim 8, wherein the correction unit includes a phase correction unit that corrects a phase of the at least one image data.

The phase correction unit corrects the phase of at least one of the image data based on the difference between the phase of the first correction data and the phase of the second correction data. 11. A magnetic resonance imaging apparatus according to 11.

The magnetic resonance imaging apparatus according to claim 12, wherein the phase correction unit corrects the phase after the intensity of the at least one image data is corrected.