摘要
目的：探讨小胰头癌在动态增强ＣＴ及螺旋ＣＴ双期增强扫描图上的ＣＴ表现。材料与方法：１０例经手术病理证实的小胰头癌患者，其中５例行动态增强ＣＴ扫描，另５例行螺旋ＣＴ双期增强扫描，动态增强ＣＴ扫描方法为：造影剂总量为８０～１００ｍｌ，行团注法，注射造影剂后２０ｓ开始作胰头部层厚、间隔各５ｍｍ的动态扫描。螺旋ＣＴ双期扫描为：造影剂总量９０ｍｌ，速率３ｍｌ／ｓ，动脉期扫描为注射造影剂３０ｓ后行胰头部螺旋扫描，层厚为５ｍｍ，螺距为１，注射造影剂后７０ｓ以同样方式作胰腺实质期扫描。结果：１０例小胰头癌（其中１例小钩突癌），肿瘤最大直径范围为１．５ｃｍ×１．５ｃｍ～２．０ｃｍ×２．０ｃｍ。平扫ＣＴ肿瘤病灶９例为等密度，１例为略低密度。增强扫描肿瘤基本为低密度，边缘可有环状强化，特别是５例行螺旋ＣＴ增强扫描动脉期肿瘤病灶呈低密度改变甚为明显。同时，除了１例钩突癌外，其余均有不同程度的总胆管、肝内胆管扩张，胰腺管扩张和胆囊增大等。结论：小胰头癌在动态增强ＣＴ和螺旋ＣＴ动脉期扫描图上主要表现为低密度改变，并且螺旋ＣＴ动脉期扫描较之动态增强ＣＴ扫描的显示更优。
Objective: To study the CT appearance of the small carcinoma of the pancreatic head (SCPH) by the dynamic enhanced CT and dualphasic enhanced spiral CT.Materials and Methods:There were 10 cases of SCPH, which were proved by surgicopathology in our study. 5 cases were performed by dynamic enhanced CT scan (DECT), the others were scanned by the dualphasic enhanced spiral CT (DPESCT). The method of DECT was used 80～100ml contrastmedia by bolus injection and started to scan the pancreas with 5mm thickness and intervals after 20s at the begining of injection the contrastmedia DPESCT consisted of the arterial and parenchymal phases begining at the 30s and 70s respectively after injection of the contrast with 90ml contrastmedia infused at 3ml/s and thickness 5mm, pitch 1.Results:The size of 10 SCPH tumors (including one carcinoma of the processus uncinatus) were ranged from 1.5cm×1.5cm to 2.0cm×2.0cm. There were 9 tumors presented isodensity and one tumor was lowdensity at the unenhanced CT images. All tumors appeared lowdensity with peripheral enhancement in the enhanced CT images. 5 tumors especially presented lower density in the arterial phase at the spiral CT than parenchymal phase of the spiral CT. Meanwhile, all cases accompanied with dilatation of common bile duct, hepatic bile duct, pancreatic duct and enlarged of gallbladder except for one carcinoma of the processus uncinatus.Conclusion: SCPH were mainly presented low density changes at the images of dynamic enhanced CT and arterial phasic enhanced spiral CT, the later CT technique is better than the former to show the tumor.
出处
《临床放射学杂志》
CSCD
北大核心
1998年第2期96-98,共3页
Journal of Clinical Radiology
关键词
胰头肿瘤
小胰头癌
CT
诊断
Small carcinoma of the pancreatic head Spiral computed tomography Dynamic enhanced computed tomography
