目的探讨多层螺旋CT及其重建 技术在胃肠道间质瘤诊断中的价值。方 法 回顾性分析我院2014年至2017年经手 术及病理学证实的胃肠道间质瘤患者20 例，运用三维重建技术总结其CT 影像 学特点，并结合文献资料，进一步提高 多层螺旋CT对胃肠道间质瘤的诊断准确 率。结果 20例患者共发现20个病灶，其 中胃18例、小肠1例、小肠系膜1例。高 危险度2例，中度危险度2例，低危险度7 例，极低危险度9例。结论 多层螺旋CT 并结合其重建技术在胃肠道间质瘤诊断 中具有很高的应用价值，为术前诊断、 危险度分级及手术方式的制定提供准确 的判断依据。

Objective To explore the value of multi-slice spiral CT and its reconstruction techniques in the diagnosis of gastrointestinal stromal tumors. Methods A retrospective analysis of our hospital from 2014 to 2017, confirmed by surgery and pathology of 20 cases of patients with gastrointestinal stromal tumor, use 3 d reconstruction technology to summarize the CT imaging characteristics, combined with the literature, further improve the multilayer spiral CT in the diagnosis of gastrointestinal stromal tumor accuracy. Results 20 cases were found in 20 patients, including 18 cases of stomach, 1 case of small intestine and 1 case of mesenteric mesentery. 2 cases of high risk, 2 cases of moderate risk, 7 cases of low risk, 9 cases of extremely low risk. Conclusion The combination of multislice CT and its reconstruction techniques in diagnosis of gastrointestinal stromal tumor has a high application value, for the preoperative diagnosis, risk classification, and provide the accurate judgment basis for the establishment of operation method.