尿路结石患者结石成分的亨氏单位比较研究。
The comparative survey of Hounsfield units of stone composition in urolithiasis patients.
作者信息
Shahnani Parisa Sotoodeh, Karami Mehdi, Astane Bahman, Janghorbani Mohsen
机构信息
Department of Radiology, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Urology, Azad university, Isfahan, Iran.
出版信息
J Res Med Sci. 2014 Jul;19(7):650-3.
BACKGROUND
Non-contrast computed tomography (NCCT) is the diagnostic choice for renal stone disease. Knowing the composition of a stone before passage can help to choose a better management. We sought to determine whether the Hounsfield unit (HU) measured by NCCT can predict the composition.
MATERIALS AND METHODS
180 urinary stones from patients seen at Shariati, Kashani and Alzahra CT centers, were submitted to stone analysis, 2012. All scans had been interpreted for HU. Primitive statistical findings showed an effect of size on the HU. To avoid confounding bias, Hounsfield Density (HD: HU/largest transverse diameter) was calculated. Statistical comparisons were performed between composition with HU and HD.
RESULTS
Calcium stones had specific ranges for HD and HU. No non-calcium stone had HU more than 448 and HD greater than 50 HU/mm.
CONCLUSION
NCCT can differentiate just Calcium from non-calcium stones.
背景
非增强计算机断层扫描（NCCT）是肾结石疾病的诊断选择。在结石排出之前了解其成分有助于选择更好的治疗方法。我们试图确定通过NCCT测量的亨氏单位（HU）是否可以预测结石成分。
材料与方法
2012年，将来自沙里亚蒂、卡沙尼和阿尔扎赫拉CT中心患者的180颗尿结石送去进行结石成分分析。所有扫描图像均已解读其HU值。初步统计结果显示结石大小对HU值有影响。为避免混杂偏倚，计算了亨氏密度（HD：HU/最大横径）。对结石成分与HU值和HD值进行了统计学比较。
结果
钙结石的HD值和HU值有特定范围。没有非钙结石的HU值超过448，HD值大于50HU/mm。
结论
NCCT只能区分钙结石和非钙结石。
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