胰腺癌CT和MRI检查技术探讨

目的探讨胰腺癌的最佳CT和MRI检查技术,提高胰腺癌的诊断准确率。方法收集37例手术或病理证实的胰腺癌患者的CT和MRI检查资料,对其检查方法和技术进行回顾性分析。结果(1)与其他各时相比较,螺旋CT胰腺期薄层扫描显示胰腺癌直接征象(胰腺肿块)最佳(P<0.01),而对胰腺癌间接征象的显示,各期扫描图像差异无显著性(P>0.05);(2)螺旋CT三期检查显示胰腺癌直接征象(胰腺肿块)较MRI(T2W MRCP)更佳(P<0.01),而对显示胰腺癌间接征象差异无显著性(P>0.05);(3)与MRI(T2W MRCP)比较,螺旋CT三期扫描诊断胰腺癌的准确率较高(P<0.01)。(4)8例患者采用SE序列T1W 脂肪抑制技术较清晰显示了胰腺癌肿块。结论螺旋CT三期扫描特别是胰腺期薄层扫描及MRI的SE序列T1W 脂肪抑制技术对胰腺癌直接征象(胰腺肿块)显示率较高,有助于提高胰腺癌诊断的准确性。

Comparative Study of CT and MRI Examination Techniques for Pancreatic Carcinoma

Objective To improve the accuracy of diagnosis for pancreatic carcinoma by comparing the techniques of CT and MRI examinations and to find out the best protocol.Methods Techniques of CT and MRI were analyzed retrospectively for 37 patients who were confirmed as pancreatic carcinoma by operation or pathology.Results (1) With spiral CT for pancreatic carcinoma, thin slice scanning in pancreatic phase was best for revealing direct sign of pancreatic mass than in any other phase (P<0.01), while there was no difference for revealing indirect signs (P>0.05); (2) Spiral CT scanning in three phases was more useful for revealing direct sign (pancreatic mass) than T_2W and MRCP of MRI, especially in pancreatic phase (P<0.01), while there was no difference for revealing indirect sign; (3) Scanning in three phases with spiral CT had higher accurate rate for diagnosis of pancreatic carcinoma than T_2W MRCP of MRI, especially in pancreatic phase; (4) However, with T1W FS of SE, direct sign for pancreatic carcinoma (pancreatic mass) could be clearly displayed in eight cases.Conclusion Scanning in three phases with spiral CT (especially in pancreatic period) and with T1W FS of SE, will be more useful for revealing direct sign (pancreatic mass) and accurate diagnosis of pancreatic carcinoma.