ABSTRACT
Objective To research special signs of MRCP,its pathological and clinical significance in carcinoma of pancreatic head.Methods 35 patients with pancreatic head carcinoma confirmed by operation and /or pathology were examined by MR before operation,including SE sequences T_1WI,FSE sequences T_2WI,T_2WI FS and MRCP.Results The special signs of MRCP in pancreatic head cancer were showed in all cases(100%),these signs included:type C1+P1 in 31 cases,type C2+P1 in 2 cases and type C2+P2 in 2 cases.The volumes of pancreatic cancer shown by MRCP were bigger than ones in operated.Conclusion MRCP features of carcinoma of pancreatic head are special.
ABSTRACT
Objective To evaluate the diagnostic value of MR cholangiopancreatography(MRCP) using three-dimensional fast recovery fast spin-echo(3D FRFSE) in differentiating benign from malignant causes of biliary and pancreatic duct dilatation.Methods 106 cases suspected biliary and pancreatic duct dilatation underwent 3D FRFSE MRCP.The images were prospectively analysed by two skilled radiologists,and the results were compared with that of surgery,biopsy or follow-up.Results MRCP was successful performed at one time in all cases.On MRCP,the visual rate of intra-and extrahepatic bile duct was 100% and that of main pancreatic duct was 93.4%.80 patients had benign lesions: bile duct lithiasis(n=66),papillitis(n=6),descending part of duodenum diverticulitis(n=2),duodenal adenomatoid hyperplasia(n=1) and chronic pancreatitis(n=5).26 patients had malignant lesions: extrahepatic cholangiocarcinoma(n=9),ampullary carcinoma(n=5),gallbladder carcinoma(n=4) and pancreatic head carcinoma(n=8).The sensitivity,specificity and accuracy in differentiating benign from malignant causes of biliary dilatation were 92.3%,96.3% and 95.3%,respectively.Conclusion 3D FRFSE MRCP plays an important role in diagnosis of differentiating diagnosis of the causes of biliary dilatation in clinical practice.