Method and apparatus for correction of phase distortion in MR im

Details Method and apparatus for correction of phase distortion in MR im Method and apparatus for correction of phase distortion in MR im

1989-04-05

1992-05-19

Cohen, Lee S.

Surgery

Truss

Pad

324307, 324309, A61B 5055

Patent

active

051138654

ABSTRACT:
In one aspect of correcting phase distortion in an MR imaging system at high speed and with high precision, partial regions having any shapes are established on a complex image reconstruction, linear phase distortion is estimated for every partial region and the phase distortion of the whole image is corrected by use of the estimated phase distortion. In another aspect, a plurality of phase distortion patterns are measured in advance through phantom imaging and stored. The phase distortion pattern is invariable and hence it is not necessary to perform the measurement for each impage processed. Phase distortion included in data acquired through imaging is corrected by representing it as a summation of the plurality of phase distortion patterns with weighting factors.

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patent: 4875012 (1989-10-01), Maeda et al.
"A Spatially Non-Linear Phase Correction for MR Angiography", Sixth Annual Meeting and Exhibition 1987, p. 29.

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