Anzai Y, Lufkin R B, Jabour B A, Hanafee W N
Department of Radiological Sciences, University of California, Los Angeles School of Medicine.
AJNR Am J Neuroradiol. 1992 May-Jun;13(3):879-84.
To describe fat-suppression failure artifacts and to caution against their misinterpretation.
Magnetic-susceptibility artifacts were studied in a phantom model and the results were compared to MR images obtained in clinical cases.
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.
In representative clinical MR exams, these artifacts were identified in the high nasopharynx and low orbit and should not be misinterpreted as pathology.
描述脂肪抑制失败伪影并警示对其的错误解读。
在体模模型中研究磁敏感性伪影，并将结果与临床病例的磁共振成像（MR）图像进行比较。
伪影表现为局灶性脂肪抑制失败区域，在沿静磁场（z）方向的磁敏感性界面处呈现为无几何变形的明亮信号。这些伪影的位置和范围与频率或相位编码方向无关，且与梯度回波图像中观察到的不同。
在典型的临床MR检查中，这些伪影在鼻咽上部和眼眶下部被识别出来，不应被错误解读为病变。
