Acute interstitial edematous pancreatitis:Findings on non-enhanced MR imaging  

作　　者：Xiao-Ming Zhang Zhi-Song Feng Qiong-Hui Zhao Chun-Ming Xiao Donald G Mitchell Jian Shu Nan-Lin Zeng Xiao-Xue Xu Jun-Yang Lei Xiao-Bing Tian 

机构地区：[1]Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong 637000, Sichuan Province, China [2]Department of Gastroenterology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong 637000, Sichuan Province, China [3]Department of General Surgery, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong 637000, Sichuan Province, China [4]Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA, United States [5]Department of Statistics, North Sichuan Medical College, Fujiang Road 234, Nanchong 637007, Sichuan Province, China

出　　处：《World Journal of Gastroenterology》2006年第36期5859-5865,共7页世界胃肠病学杂志（英文版）

基　　金：Supported by Key project of Science and Technology Research, Ministry of Education, China, No. 206126

摘　　要：AIM： To study the appearances of acute interstitial edematous pancreatitis （IEP） on non-enhanced MR imaging. METHODS： A total of 53 patients with IEP diagnosed by clinical features and laboratory findings were underwent MR imaging. MR imaging sequences included fast spoiled gradient echo （FSPGR） fat saturation axial T1-weighted imaging, gradient echo T1-weighted （in phase）, single shot fast spin echo （SSFSE） T2-weighted, respiratory triggered （R-T） T2-weighted with fat saturation, and MR cholangiopancreatography. Using the MR severity score index, pancreatitis was graded as mild （0-2 points）, moderate （3-6 points） and severe （7-10 points）. RESULTS： Among the 53 patients, IEP was graded as mild in 37 patients and as moderate in 16 patients. Forty-seven of 53 （89%） patients had at least one abnormality on MR images. Pancreas was hypointense relative to liver on FSPGR T1-weighted images in 18.9% of patients, and hyperintense in 25% and 30% on SSFSE T2-weighted and R-T T2-weighted images, respectively. The prevalences of the findings of IEP on R-T T2-weighted images were, respectively, 85% for pancreatic fascial plane, 77% for left renal fascial plane, 55% for peripancreatic fat stranding, 42% for right renal fascial plane, 45% for perivascular fluid, 40% for thickened pancreatic Iobular septum and 25% for peripancreatic fluid, which were markedly higher than those on in-phase or SSFSE T2-weighted images （P 〈 0.001）. CONCLUSION： IEP primarily manifests on non- enhanced MR images as thickened pancreatic fascial plane, left renal fascial plane, peripancreatic fat stranding, and peripancreatic fluid. R-T T2-weighted imaging is more sensitive than in-phase and SSFSE T2- weighted imaging for depicting IERAIM: To study the appearances of acute interstitial edematous pancreatitis (IEP) on non-enhanced MR imaging. METHODS: A total of 53 patients with IEP diagnosed by clinical features and laboratory findings were underwent MR imaging. MR imaging sequences included fast spoiled gradient echo (FSPGR) fat saturation axial T1-weighted imaging, gradient echo T1-weighted (in phase), single shot fast spin echo (SSFSE) T2-weighted, respiratory triggered (R-T) T2-weighted with fat saturation, and MR cholangiopancreatography. Using the MR severity score index, pancreatitis was graded as mild (0-2 points), moderate (3-6 points) and severe (7-10 points). RESULTS: Among the 53 patients, IEP was graded as mild in 37 patients and as moderate in 16 patients. Forty-seven of 53 (89%) patients had at least one abnormality on MR images. Pancreas was hypointense relative to liver on FSPGR T1-weighted images in 18.9% of patients, and hyperintense in 25% and 30% on SSFSE T2-weighted and R-T T2-weighted images, respectively. The prevalences of the findings of IEP on R-T T2- weighted images were, respectively, 85% for pancreatic fascial plane, 77% for left renal fascial plane, 55% for peripancreatic fat stranding, 42% for right renal fascial plane, 45% for perivascular fluid, 40% for thickened pancreatic lobular septum and 25% for peripancreatic fluid, which were markedly higher than those on in-phase or SSFSE T2-weighted images (P < 0.001).CONCLUSION: IEP primarily manifests on non-enhanced MR images as thickened pancreatic fascial plane, left renal fascial plane, peripancreatic fat stranding, and peripancreatic fluid. R-T T2-weighted imaging is more sensitive than in-phase and SSFSE T2-weighted imaging for depicting IEP.

关 键 词：PANCREAS PANCREATITIS Inflammation EDEMA Magnetic resonance 

分 类 号：R657.51[医药卫生—外科学]