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American Journal of Neuroradiology, Vol 13, Issue 3 879-884, Copyright © 1992 by American Society of Neuroradiology

ARTICLES

Fat-suppression failure artifacts simulating pathology on frequency- selective fat-suppression MR images of the head and neck

Y Anzai, RB Lufkin, BA Jabour and WN Hanafee
Department of Radiological Sciences, University of California, Los Angeles School of Medicine.

PURPOSE: To describe fat-suppression failure artifacts and to caution against their misinterpretation. METHOD: Magnetic-susceptibility artifacts were studied in a phantom model and the results were compared to MR images obtained in clinical cases. FINDINGS: Artifacts manifested themselves as regions of focal fat-suppression failure and appeared as bright signals without geometric distortions at magnetic-susceptibility interfaces along the static field (z) direction. The location and extent of these artifacts were independent of either frequency or phase- encoding direction and are different from those observed in gradient- echo images. CONCLUSIONS: In representative clinical MR exams, these artifacts were identified in the high nasopharynx and low orbit and should not be misinterpreted as pathology.


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Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X