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PT  - JOURNAL ARTICLE
AU  - Chou, M.-C.
AU  - Wang, C.-Y.
AU  - Liu, H.-S.
AU  - Chung, H.-W.
AU  - Chen, C.-Y.
TI  - Pseudolesions Arising from Unfolding Artifacts in Diffusion Imaging with Use of Parallel Acquisition: Origin and Remedies
AID  - 10.3174/ajnr.A0532
DP  - 2007 Jun 01
TA  - American Journal of Neuroradiology
PG  - 1099--1101
VI  - 28
IP  - 6
4099  - http://www.ajnr.org/content/28/6/1099.short
4100  - http://www.ajnr.org/content/28/6/1099.full
SO  - Am. J. Neuroradiol.2007 Jun 01; 28
AB  - SUMMARY: Diffusion imaging acquired with echo-planar imaging (EPI) is usually performed with parallel imaging to reduce geometric distortions, especially at high fields. This study reports the occurrence of pseudolesions in EPI with parallel imaging. The unfolding artifacts are attributed as arising from a mismatch between RF sensitivity profiles and distorted acquisition data in the presence of susceptibility effects, plus strong signals on the b = 0 images. Examples of pseudolesions from the eyeballs are shown, and remedies are suggested.