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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。
OBJECTIVE: To quantitatively assess the degree of enhancement of the pancreas by double-phase electron beam CT scanning. Materials and Methods: All 110 suspected suspicious pancreatic lesions (26-72 years old) underwent electron beam CT. There were 15 cases of pancreatic cancer, 3 cases of pancreatitis, 2 cases of pancreatic trauma, and 90 cases of normal pancreas. Ultravist 100 ml was injected using a high-pressure syringe at a rate of 3.5 ml/sec (80 ml) and 10 ml/sec (20 ml). After 20 to 20 seconds and 55 to 60 seconds after contrast injection, 20 layers of pancreas were scanned using the SVS 0.3 second sequence. Thickness 6mm. The CT values of the head, body and tail of the pancreas were measured at the arteriovenous stage. Results: In the arterial phase, the enhanced CT value of the pancreas was 101 Hu±8 (standard deviation), and the venous phase was 81 Hu±5. Among them, 61 cases (55%) had an increase of more than 20Hu in the arterial phase compared with the venous phase; 38 cases (34%) had an increase of more than 10Hu; 11 cases (10%) had a lower CT value in the arterial phase than in the venous phase. Conclusion: The pancreatic arterial phase scan can provide more detailed anatomical structure than the venous phase. It can more clearly show pancreatic cancer infiltration of the pancreas, and can improve the accuracy of detecting small lesions in the pancreas.