Motion detection and correction method for magnetic resonance diffusion weighted imaging (DWI)
First Claim
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1. A magnetic resonance imaging system, comprising:
- at least one processor programmed to;
receive diffusion weighted imaging data from a region of interest of a subject based on a diffusion weighted imaging sequence with magnetic gradient fields applied in different directions and with different b-values;
detect motion corrupted data present in the received imaging data based on a comparison of data redundant in the received data, the data redundancy existing from the diffusion weighted imaging data received for the magnetic gradient fields applied in three orthogonal directions, the motion corrupted data being detected by comparing the diffusion weighted imaging data from two of the three orthogonal directions with the diffusion weighted imaging data from a third orthogonal gradient field measure of a third of the three orthogonal directions; and
substitute alternative data for detected motion corrupted data.
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Abstract
A magnetic resonance imaging system (1) includes at least one processor (28) configured to receive (48) diffusion weighted imaging data based on a diffusion weighted imaging sequence with magnetic gradient fields applied in different directions and with different b-values. The at least one processor (28) is further configured to detect (50) motion corrupted data present in the received imaging data based on a comparison of data redundant in the received data, and substitute (52) alternative data for detected motion corrupted data.
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Citations
20 Claims
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1. A magnetic resonance imaging system, comprising:
- at least one processor programmed to;
receive diffusion weighted imaging data from a region of interest of a subject based on a diffusion weighted imaging sequence with magnetic gradient fields applied in different directions and with different b-values;
detect motion corrupted data present in the received imaging data based on a comparison of data redundant in the received data, the data redundancy existing from the diffusion weighted imaging data received for the magnetic gradient fields applied in three orthogonal directions, the motion corrupted data being detected by comparing the diffusion weighted imaging data from two of the three orthogonal directions with the diffusion weighted imaging data from a third orthogonal gradient field measure of a third of the three orthogonal directions; and
substitute alternative data for detected motion corrupted data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- at least one processor programmed to;
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8. A method of magnetic resonance imaging, comprising:
- receiving diffusion weighted imaging data from a region of interest of a subject based on a diffusion weighted imaging sequence with magnetic gradient fields applied in three orthogonal directions and with different b-values;
detecting motion corrupted data present in the received imaging data based on a comparison of data redundant in the received data, the data redundancy existing from the diffusion weighted imaging data received for the magnetic gradient fields applied in the three orthogonal directions, the motion corrupted data being detected by comparing the diffusion weighted imaging data from two of the three orthogonal directions with the diffusion weighted imaging data from a third orthogonal gradient field measure of a third of the three orthogonal directions; and
substituting alternative redundant data from the received data for detected motion corrupted data. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- receiving diffusion weighted imaging data from a region of interest of a subject based on a diffusion weighted imaging sequence with magnetic gradient fields applied in three orthogonal directions and with different b-values;
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15. A magnetic resonance system, comprising:
- a processor programmed to;
receive diffusion weighted imaging data based on a diffusion weighted imaging sequence with magnetic gradient fields applied in different directions and with different b-values;
detect motion corrupted data present in the received imaging data based on a comparison of data redundant in the received data, the data redundancy existing from the diffusion weighted imaging data received for the magnetic gradient fields applied in the three orthogonal directions, the motion corrupted data being detected by comparing the diffusion weighted imaging data from two of the three orthogonal directions with the diffusion weighted imaging data from a third orthogonal gradient field measure of a third of the three orthogonal directions; and
substitute alternative data for detected motion corrupted data;
a repetitive motion monitoring unit which determines an expected time interval of repetitive motion of a subject; and
a gradient motion control unit which adjusts for acquisition of the diffusion weighted imaging data of the subject with a directional sensitivity of the applied magnetic gradient fields along three axes to be sensitive orthogonal to a direction of repetitive motion during the determined time interval. - View Dependent Claims (16, 17, 18, 19, 20)
- a processor programmed to;
Specification