【摘要】 目的 :探讨螺旋CT双期增强扫描诊断胰腺癌的价值。方法 :16例胰腺癌患者行螺旋CT双期增强扫描 ,动脉期延迟 2 5s,门静脉期延迟 60s ,以 3mL/s团注造影剂 80～ 10 0mL。测量肿瘤和正常胰腺组织的CT值 ,计算肿瘤 -胰腺密度差 ,同时对胰腺周围血管进行观察评价。结果 :肿瘤的平均CT值动脉期和门静脉期分别为 (4 7± 8)HU、(5 3± 10 )HU ;正常胰腺动脉期和门静脉期的CT值分别为 (10 9± 16)HU ,(76± 13)HU ;肿瘤 -胰腺密度差动脉期和门静脉期各为 (70± 18)、(2 3± 12 )HU ,二者差异明显 (P <0 0 1)。胰周动脉侵犯在动脉期显示好 ,静脉侵犯在门静脉期显示好。结论 :螺旋CT双期增强扫描动脉期可获得最大的肿瘤 -胰腺密度差 ,动脉期结合门静脉期对胰周血管侵犯的评价更全面 ,提高了胰腺癌手术可切除性评价的准确性。更多还原

【Abstract】 Aim: To study the protocols of dual-phase spiral CT for the evaluation of pancreatic carcinoma. WTHZMethods:WTBZ Sixteen patients were undergone examination of dual-phase spiral CT. The patients were scanned for both arterial and portal phases(25 s and 60 s after intravenous administration of 80-100 mL contrast material at 3 mL/s). The mean CT value was obtained for normal pancreatic parenchyma and tumor, respectively. The density difference between tumor and pancreatic parenchyma was evaluated. Peripancreatic blood vessels were observed and evaluated. WTHZResults:WTBZ In the arterial and portal phases, the mean CT values were 47±8 HU and 53±10 HU for pancreatic tumors, 109±16 HU and 76±13 HU for normal pancreatic parenchyma, respectively. The density difference between tumor and normal pancreas in the arterial phases was significantly more than that in the portal phase (P<0.01). Peripancreatic artery invasion was visualized well in the arterial phase. The vein invasion was visualized well in the portal phase. Conclusion: The density difference between tumor and normal pancreas can be well depicted by spiral CT. Vascular invasion can be evaluated much more completely by combining arterial and portal phase. There is an important value of spiral CT in the diagnosis of pancreatic carcinoma.更多还原