目的探讨双源CT双能量成像技 术对体内尿石成分的识别价值。方法 选 择406例尿路结石患者共406枚结石进行 研究，均行西门子炫速双源CT(Siemens Somatom Definition Flash Dual-source CT,DSCT)进行双能量扫描并重建结石的彩 色编码图像；采用红外光谱分析确定所有 结石样本成分。结果 以红外光谱分析结 果为标准，双源CT双能量结石分析技术识 别尿酸类结石、胱氨酸结石、羟磷灰石、 草酸钙类结石及混合型结石成分的准确 性分别为96.7%，99.5%，98.5%，95.1%， 89.9%。结论 双源CT双能量技术能够有效 识别体内泌尿系结石的成分组成。

Objective To investigate the clinical value of the determination of renal stone composition in vivo with dual-source dual-energy computed tomography(DSDECT). Methods 406 cases with 406 renal stones were collected. All cases were scanned with dual-energy acquisition by dual-source CT. The data were sent to the workstation for the analysis of the stone composition. The urinary stones were analyzed by infrared spectroscopy after surgery. These two results were compared and the infrared spectroscopy result was taken as the reference standard. Results The accuracy of DSDECT for detecting the presence of four types of composition, uric acid, cysteine, hydroxyapatite, calcium oxalate and mixed stones, was 96.7%, 99.5%, 98.5%, 95.1% and 89.9% respectively. All cystine stones were with false positive results. Conclusion DSDECT could accurately predict the major component of urinary calculi and detect uric acid, cysteine, and calcium oxalate with a satisfactory accuracy.