Diffusion-weighted MRI method

Details Diffusion-weighted MRI method Diffusion-weighted MRI method

1998-04-09

2000-06-13

Casler, Brian L.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

324309, A61B 5055

Patent

active

060760060

ABSTRACT:
A diffusion weighted MR method for forming images of diffusion of spins in biological tissue. In order to correct macroscopic motions, the MR method measures navigator MR signals wherefrom a phase correction is derived for the MR signals. During the imaging of, for example a part of the brain of a human or animal, artefacts may arise at the areas of the image which correspond to regions in the part of the brain which contain CSF. The artefacts in the MR image can be reduced by determining a corrected phase, for measuring points having a modulus smaller than the threshold value, from the phases of different reference measuring points of the navigator MR signal for which the phase can be determined with a sufficiently small error.

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By K. Butts et al., "Diffusion-Weighted Interleaved Echo-Planner Imaging with a Pair of Orhtogonal Navigator Echoes", Magnetic Resonance in Medicine, 1996 No. 35, pp. 763-770.

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