Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2005-11-22
2005-11-22
Shrivastav, Brij B. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S309000
Reexamination Certificate
active
06967479
ABSTRACT:
The present invention includes a method and apparatus to correct for gradient field distortions. The invention is particularly applicable in moving table imaging where a single extended image is desirable. The invention includes acquiring MR data in motion in the presence of gradient non-linearities, transforming the MR data acquired into the image domain, and then applying a warping correction function to the transformed MR data. The warp-corrected MR data is then corrected for motion induced during the MR acquisition. The data may be acquired point-by-point, line-by-line, or another sub-portion of the entire MR data acquired, and processed to minimize the amount of motion correction needed. Based on table velocity or acquisition sequence applied, the data is partitioned based on a common motion correction factor, and after correcting for motion, the data is accumulated to build up a final image.
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Kruger David G.
Polzin Jason A.
Riederer Stephen J.
Della Penna Michael A.
GE Medical Systems Global Technology Co. LLC
Horton Carl B.
Mayo Clinic
Shrivastav Brij B.
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