电子束CT双期扫描定量估价胰腺增强程度

目的：定量估价电子束ＣＴ双期扫描胰腺的增强程度。材料和方法：１１０例可疑胰腺病变者（２６～７２岁）均行电子束ＣＴ检查。其中胰腺癌１５例，胰腺炎３例，胰腺外伤２例，正常胰腺９０例。应用高压注射器以３．５ｍｌ／秒（８０ｍｌ）和１０ｍｌ／秒（２０ｍｌ）速度注射Ｕｌｔｒａｖｉｓｔ１００ｍｌ，在注射造影剂后１８～２０秒和５５～６０秒，应用ＳＶＳ０．３秒序列扫描胰腺２０层，层厚６ｍｍ。于动静脉期测量胰腺头、体、尾ＣＴ值。结果：在动脉期胰腺增强的ＣＴ值为１０１Ｈｕ±８（标准差），静脉期为８１Ｈｕ±５。其中６１例（５５％）动脉期较静脉期ＣＴ值增高２０Ｈｕ以上；３８例（３４％）增高１０Ｈｕ以上；１１例（１０％）动脉期ＣＴ值低于静脉期。结论：胰腺动脉期扫描较静脉期可提供更详细的解剖结构，可更清楚显示胰腺癌对胰周的浸润，可提高检测胰腺内小病灶的准确性。

Quantitative Evaluation of Pancreatic Enhancement During Dual-phase Electron Beam CT Scanning

Quantitative evaluation of pancreatie enhancement during dual-phase electron beam CT (EBCT) scanning.Materials and Methods:EBCT examinations were performed in 110 patients(aged 26-72 years)with suspected pancreatic lesions.The diseases included followings.Pancreatic cancer(n=15),pancreatitis(n=3), trauma (n=2), normal (n=90).At a rate of 3.5ml/sec.(80ml)and 1.0ml/sec.(20ml), totally ultravist 100ml by a power injector,the first scan and the second scan were taken at 18-20sec. and 55-60 sec, after injection,The SVS 0.3 sec. mode with 6-mm slice thickness and 20 slices were taken there ofter.CT value of regions of interest (ROls) were obtained from the largest and most homogeneous areas of the head, body and tail of the pancreas on corresponding AP and PVP scans.Results; Mean pancreatic enhancement revealed on AP scans and on PVP scans were 101 Hu 8 (standard error) and 81Hu 5 (P<0.001).Those on AP scans comparing with on PVP scans, an improvement in enhancement of at least 20 HU was attained in 61 of 110 (55/),and of at least 10 HU in 38 of 110(34%);however, AP enhancement was less than PVP enhancement in 11 of 110(10%).Conclusion:The anatomy structure demonstrated on AP scans was more detailed than that on PVP scans.Comparing AP and PVP scans, peripancreatic invasion of cancer could be shown more clear,and the accuracy for detection small pancreatic lesions thus be improved.