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目的 探讨64层螺旋CT三期增强扫描和三维重组在胰岛细胞瘤中的诊断价值.资料与方法 回顾性分析12例经手术病理证实的胰岛细胞瘤患者的64层螺旋CT表现,重点分析动脉期及静脉期强化特点.结果 12例胰岛细胞瘤均为单发,全部位于胰头,平扫8例与胰腺呈等密度,4例可见钙化,部分可见局限性隆起,但与正常胰腺分界不清.增强后动脉期呈明显均匀强化,CT值较正常胰腺平均高75～85 HU,静脉期强化程度较动脉期略下降,CT值较正常胰腺平均高47～57 HU.增强后瘤体边界与正常胰腺分界清晰.结论 64层螺旋CT三期增强扫描及三维重组在胰岛细胞瘤诊断中有重要价值.“,”Objective To explore the diagnosis value of 64-slice spiral CT three enhanced scanning and three-dimensional reconstruction in the islet cell tumor. Materials and Methods 12 cases of islet cell tumor proved by operation and pathology were scanned by 64-slice spiral CT. The CT characteristics of arterial and venous phase enhancment were analyzed mainly. Results The lesion was single and located at the pancreatic head in every case. 8 cases had isodense with the pancreas. Calcifications were showed in 4 cases at non-enhanced scan. Some lesions bulged outward without clear boundary. Significantly homogeneous enhancement, average 75 -85 HU increase, were showed at arterial phase. Average 47 ～ 57Hu decrease was showed at venous phase enhancement. The tumors boundary showed more clearly after enhancement. Conclusion The diagnosis of 64-slice spiral CT three enhanced scanning and three-dimensional reconstruction has important value in the diagnosis of islet cell tumor.