【摘要】 目的 研究螺旋CT胰腺期、门脉期双期增强扫描在胰腺癌诊断和正确评估胰腺周围血管侵犯及手术切除中的价值。方法 对24例胰腺癌患者行螺旋CT双期增强扫描，扫描延迟时间分别为30s和65s，对比剂用量100ml，注射速度3ml/s。观察并比较正常胰腺与肿瘤在两期增强中的对比情况，以及胰腺周围血管的受侵情况。根据胰周血管CT征象对肿瘤可切除性进行评价，并与手术结果比较。结果 肿瘤-胰腺明显对比在胰腺期明显优于门脉期(22/24，8/24，P<0.01)。胰腺期扫描能清晰显示胰周血管，其中胰周血管中断6例，包绕4例，部分包绕3例。24例肿瘤患者中，术前认为可以切除11例，术中切除10例。结论 螺旋CT胰腺期增强扫描比门脉期增强扫描更清晰地显示胰腺癌，并有利于胰腺癌周围血管侵犯和可切除性的评估。

    Li Liren，Shi Yuxin

    Affiliated Hospital of Nantong Medical College，Jiangsu226001.

    【Abstract】 Objective To evaluate the value of dual-phase helical CT in diagnosis and correct assessment vascular invasion and resectability of pancreatic adenocarcinoma(PA).Methods Dual-phase helical CT was perˉformed on24patients with PA with80ml intravenous contrast material injected at a rate of3ml/s.Pancreatic phase(PP)and portal venous(PVP)began at30seconds and65seconds after the start of the injection respectively.The enhancement of normal pancreas and tumor during the two phases was observed and compared.The assessment of tumor respectability based on CT finding was compared with surgical and histopathologic results.Results Tumor-pancreas contrast during PPwas significantly higher than that during PVP(22/24 ......