Method for correcting MR phase information image data

Details Method for correcting MR phase information image data Method for correcting MR phase information image data

1995-12-08

1997-06-24

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

056420471

ABSTRACT:
A method for correcting MR data elements acquired in the presence of an imperfectly linear gradient field, each element comprising nominal first and second quadrature components. The quadrature components are multiplied by an artifact correction factor to provide respective first and second quantities. A Gradwarp geometric correction operation is applied to respective quantities to provide a corrected first and second quadrature component, corresponding to each data element. For a given data element, the arctangent function is applied to the result obtained by dividing the first corrected component by the second corrected component to provide a corrected phase component for use in forming an image.

REFERENCES:
patent: 4591789 (1986-05-01), Glover et al.
patent: 5498963 (1996-03-01), Schneider et al.
Bernstein and Frigo, "Gradient Non-Linearity Correction for Phase Difference Images", Proceedingsof the SMR and Eur. Soc. for Mag. Res. in Med. & Biol., vol. 2, p. 739, Aug., 1995, Nice, France.

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