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目的：评价ＣＴ预测甲基叔丁醚溶石过程和结果的价值。方法：４５例胆石患者行体外ＣＴ扫描，以红外光谱仪定量分析胆石的４种主要化学成分，各例取１枚行甲基叔丁醚溶石试验。结果：依ＣＴ特点胆石被分成５类；溶石的结果与胆固醇含量密切相关，含胆固醇超过４０％者方被溶解；对于结构均匀的结石，ＣＴ值越小，溶石速度越快，残留结石越少，反之亦然；对于结构分层的结石，其周边部分的胆固醇含量将影响溶石过程，甲基叔丁醚可渗透胆固醇含量低的周边而溶解胆固醇性中心。结论：ＣＴ能较准确地预测甲基叔丁醚溶石的过程和结果。
OBJECTIVE: To evaluate the value of CT in predicting the course and outcome of MTB dissolution. Methods: 45 cases of gallstone patients underwent CT scan in vitro, infrared spectroscopy quantitative analysis of the four main chemical constituents of gallstone, each case take 1 methyl tert-butyl ether dissolved stone test. Results: According to the characteristics of CT, gallstones were divided into five categories; the results of dissolving stone were closely related to the content of cholesterol, and those containing more than 40% of cholesterol were dissolved. For the uniform structure, the smaller the CT value was, the faster the dissolution rate was. Less and vice versa; for structurally stratified stones, the cholesterol content of the surrounding parts will affect the dissolution of the lysophosphates and methyl tert-butyl ether may penetrate the periphery with low cholesterol content to dissolve the cholesterol centers. Conclusion: CT can predict the process and result of MTBE more accurately.