Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1994-11-29
1996-08-13
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324308, 324300, G01R 3320
Patent
active
055459951
ABSTRACT:
A calibration procedure for correcting geometric errors in MRI images due to gradient field non-linearities and magnetic field inhomogeneities includes performing a 3D scan on a calibration phantom. The calibration phantom contains an array of tapered rods that produce an array of spots in reconstructed slice images. Spot sizes and positions enable position errors to be measured throughout the bore of the imaging system. Corrective coefficients are produced from these 3D error measurements that enable subsequent patient images to be corrected for warping errors in object position.
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Linz Anton M.
Repinski Gregory A.
Schneider Erika
General Electric Company
Mah Raymond Y.
O'Shea Sandra L.
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