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MR Manifestations and its Diagnostic Value of Renal Milk of Calcium
Author(s): 
Pages: 1851-1854
Year: Issue:  12
Journal: Journal of Clinical Radiology

Keyword:  Renal milk of calciumComputed tomographyMagnetic resonance imagingHalf moon sign;
Abstract: 目的 探讨肾钙乳的MRI表现及其诊断价值.方法 回顾性分析经MRI检查并经临床随访确诊的18例肾钙乳患者的MRI表现,并与其X线及CT表现对照.结果 18例肾钙乳全部经MRI检查确诊(准确率100%),典型MRI表现为肾实质内圆形囊性病灶,17例T1WI呈明显低信号,T2WI表现为病灶上部呈明显高信号,病灶下部呈明显低信号,两者之间构成水平状高低信号界面,即典型“半月征”,此征象在压脂T2WI上显示更加清晰.另1例在T1WI上钙乳表现为高信号,其上缘隆起,颇似“盘中盛果”.18例KUB平片(卧位及站立位)分别表现为典型“麻饼征”和“半月征”;18例CT扫描表现为病灶下部为高密度,病灶上部为低密度,两者之间构成水平状高低密度界面,改变体位扫描见高密度钙乳的位置始终位于囊腔最低处.结论 肾钙乳具有特征性MRI表现,诊断准确率高,无辐射,是值得推荐的诊断方法.
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