Grase MRI with read gradient polarity correction and T.sub.2 mea

Details Grase MRI with read gradient polarity correction and T.sub.2 mea Grase MRI with read gradient polarity correction and T.sub.2 mea

1994-12-22

1996-12-03

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

1286532, G01R 3348

Patent

active

055811817

ABSTRACT:
In a GRASE magnetic resonance method, most profiles in k-space with a certain k.sub.y value are measured with different magnetic field read gradient polarity and at different time intervals from the excitation RF-pulse. The two resulting sets of measurements, with positive and negative read gradient polarity, respectively, are used to correct read gradient polarity dependent phase errors, in order to obtain reconstructed images in which the effects of these phase errors are greatly reduced. In an improved version the measurements are used to reconstruct images with a predictable T.sub.2 weighting.

REFERENCES:
patent: 4740748 (1988-05-01), Rzedzian
patent: 5055789 (1991-10-01), Kondo et al.
patent: 5122747 (1992-06-01), Riederer et al.
patent: 5162730 (1992-11-01), Schmitt et al.
patent: 5270654 (1993-12-01), Feinberg et al.
patent: 5304931 (1994-05-01), Flamig et al.
patent: 5337000 (1994-08-01), Bruder

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