Stephen D Flax

US Patent:

49947443, Feb 19, 1991

Filed:

Mar 26, 1990

Appl. No.:

7/499235

Inventors:

Gary H. Glover - Menlo Park CA
Stephen W. Flax - Wauwatosa WI

Assignee:

General Electric Company - Milwaukee WI

International Classification:

G01R 3320

US Classification:

324309

Abstract:

Displacement values which indicate respiration phase are acquired along with each view of an NMR scan. Two or more such NMR scans are conducted and the deviation of each displacement value from a smooth reference curve is employed to measure the integrity of its associated NMR image data. The NMR image data from the separate scans are combined to reduce random noise and motion artifacts, and the combination is accomplished by weighting the data in accordance with its measured integrity.

US Patent:

52007006, Apr 6, 1993

Filed:

Nov 30, 1990

Appl. No.:

7/620177

Inventors:

Gary H. Glover - Menlo Park CA
Stephen W. Flax - Wauwatosa WI
Ann Shimakawa - San Francisco CA

Assignee:

General Electric - Milwaukee WI

International Classification:

G01R 3320

US Classification:

324309

Abstract:

NMR image data acquired from a human subject is corrected for view-to-view motion caused by respiration. As each view is acquired the position of the subject is also measured to indicate the distance of the anterior abdominal wall from a reference position. The acquired NMR image data is corrected using the associated measured distances and a simplified model of the motion.