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Motion artifacts in fast spin-echo imaging

✍ Scribed by Bruno Madore; R. Mark Henkelman

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 836 KB
Volume: 4
Category: Article
ISSN: 1053-1807
DOI: 10.1002/jmri.1880040411

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The purpose of this work is to obtain a better understanding of motion artifacts in fast spin‐echo imaging, in order to eventually identify efficient ways of suppressing them. To do so, the point spread function of a moving point was calculated for fast spin‐echo imaging, and experimental data were acquired by imaging a moving liquid sphere with a diameter of 1.5 mm. The agreement of the experimental results with the calculated point spread function is shown to be excellent. It was found that motion artifacts in fast spin‐echo imaging arise from the convolution of two distinct band patterns. One of these patterns may dominate the convolution, giving its own spacing to the resulting image. For other acquisition parameters, the convolution results in an intricate pattern that may appear to lack overall structure.

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