能谱CT有效平均原子序数对离体尿路结石成分分析的前瞻性研究  

Prospective study on component analysis of isolated urinary calculus by effective average atomic number of energy spectrum CT

作　　者：黄科峰[1] 周宝成[1] 黄金山[1] 黎颖[1] 宋君[1] 孟安起[1] 王中宁[1] 曾社平[1] 韩金安[1] 姜小平[1] 黎昌华[1] 曹会志[2] 陈恳[2] 

机构地区：[1]解放军第477医院放射科,湖北襄阳441003 [2]GE公司中国区CTRC

出　　处：《临床军医杂志》2011年第4期615-617,F0004,共4页Clinical Journal of Medical Officers

摘　　要：目的探讨能谱CT瞬时双能成像技术预测尿路结石成分准确性的意义。方法选择本院开放手术或腔内碎石、体外震波碎石收集的结石,经气相色谱仪分析后,分别埋入猪肾中,采用美国GE公司能谱CT(D iscovery CT 750HD)机,分别扫描,进行能谱分析,获取平均有效原子序数值并计算结石成分分析的准确率。结果本组60枚离体尿路结石能谱CT有效平均原子序数:一水草酸钙结石为14.3、二水草酸钙结石为14.51、磷酸钙结石为16.14、磷酸氢钙结石为14.12、尿酸结石为6.92、磷酸胺镁结石为8.49、胱氨酸结石为10.21,互相之间差异性均较明显。结论 能谱CT测定结石平均有效原子序数可以较准确判定结石化学成分。Objective To analyze the significance of accuracy of instantaneous dual-energy spectrum CT imaging in prediction of urinary calculus component.Methods The calculi which were collected through open operation,endoluminal lithotripsy and extracorporeal shock-wave lithotomy were analyzed by gas chromatograph and embedded in pig kidneys,they were scanned by energy spectrum CT machine（Discovery CT 750HD,America CE Company） respectively to acquire effective average atomic number and to compute the accuracy of calculus component analysis.Results Effective average atomic number of 60 cases with isolated urinary calculus： calcium oxalate monohydrate was 14.3,calcium oxalate dihydrate was 14.51,calcium phosphate was 16.14,calcium hydrophosphate was 14.12,uric acid was 6.92,magnesium ammonium phosphate was 8.94 and cystine calculus was 10.21.There are obvious differences between each other.Conclusion The effective average atomic number of energy spectrum CT can precisely determine the chemical composition of calculus.

关 键 词：尿路结石 成分分析 能谱CT 瞬时双能成像技术 

分 类 号：R816.7[医药卫生—放射医学]