MR Imaging of Pancreas:the Study of Dynamic Enhanced Delay Scanning Time Window
- VernacularTitle:胰腺MRI:动态增强扫描最佳延迟时间窗的研究
- Author:
Jing WANG
;
Lei GAO
;
Jianping LU
;
Lebin WU
- Publication Type:Journal Article
- Keywords:
pancreas;
magnetic resonance imaging;
technique and procedure
- From:
Journal of Practical Radiology
2001;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To make up the time versus enhancement index curves of normal pancreas and to investigate the best multiphasedelay scanning time window. Methods 60 patients without pancreatic diseases were randomly assigned to A, B, C group. Test-bolusimaging was performed to determine aortic transit time (TV-A) in individual patients. According to the formula: D=T V-A-1/4TA+t,the multiphase scanning time after administration of Gd-DTPA was defined at t=0,5,10 seconds respectively to A,B,C group. Signalintensity of pancreas, liver, and per-pancreatic vessels were measured ,enhancement index was calculated and images quality wasassessed . Results B delay of 5 s after arrival of Gd-DTPA to the abdominal aorta , the enhancement index of pancreas in B group was 18.6 , which evidently higher than A group 10.4 and C group 15.0 (P0.05 ) . Conclusion Biphasic imaging at 5 and 33 seconds after arrival of contrast media to abdominal aorta is a practical method for acquisition of high-quality dynamic enhanced MR imaging of the pancreas.
