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目的 分析多层螺旋CT在胃间质瘤诊断中的价值.方法 回顾性分析18例经手术病理证实的胃间质瘤患者临床及CT资料.结果 18例胃间质瘤均为单发病灶.肿瘤多呈圆形或类圆形,多发生于胃体部,瘤体17 mm× 14 mm～86 mm× 50 mm.多层螺旋CT平扫呈不均匀或稍低密度,8例伴有坏死、囊变,2例见点状钙化.多平面重建技术可清晰显示肿瘤与周围组织结构关系.病理诊断:良性12例,恶性5例,潜在恶性1例.18例均无胃周淋巴结肿大;有肝脏转移1例.结论 胃间质瘤的多层螺旋CT表现有一定特点,CT动态增强扫描结合多平面重建技术可清晰显示肿瘤与周围组织结构关系,对胃间质瘤诊断、选择治疗方法和评估预后具有重要价值.“,”Objective To analyze the value of multi-slice helical CT scanning in the diagnosis of gastric stromal tumor(GST).Methods Clinical and imaging data of 18 cases with GST diagnosed pathologically were retrospectively analyzed.Results The lesions were all solitary.The tumors were round or similarly round which located mostly at gastric body and sized from 17 mm× 14 mm to 86 mm× 50 mm in diameters.CT scanning showed uneven or slightly low density.Necrosis capsule was detected in 8 cases and calcification was detected in 2 cases.Multiplanar reformation showed clearly the relationship of GST with the tissues around it.Pathologically,5 cases were malignant,one case was potential malignant and 12 cases were benign.No stomach lymph node enlargement was seen in 18 cases.One case was found to have liver metastasis.Muhiplanar reformation displayed the relationship of tumor and stomach clearly.Conclusion The CT imaging of gastric stromal tumor has some characteristics.Dynamic enhanced CT scanning and multiplanar reformation are helpful to determine tumor location and the relationship of GST with the tissues around it.Multi-slice helical CT scanning has an important role in the diagnosis,selection of treatment and evaluation of GST.