Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1998-06-15
2000-12-19
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
324307, G01V 300
Patent
active
061631523
ABSTRACT:
A system and method for correcting systematic errors that occur in MR images due to magnetic gradient non-uniformity is disclosed for use with parametric analysis. A GradWarp geometric correction operation is applied in reconstructing quantitative parametric analysis images in regions of gradient non-uniformity. The method includes generating an error map of magnetic gradient strength as a function of distance for an MR image scan and acquiring MR data that contain such systematic errors. The method next includes either calculating a measured diffusion image, a phase difference image, or similar image, based on the acquired MR data, and then calculating a corrected parametric image using the error map and the measured diffusion image, the phase difference image, or other similar parametric image. The method is incorporated into a system having a computer programmed to perform the aforementioned steps and functions.
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Bernstein Matthew A.
Polzin Jason A.
Cabou Christian G.
Fetzner Tiffany A.
General Electric Company
Oda Christine K.
Price Phyllis Y.
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