Utility of Single Shot Fast Spin Echo Technique in Evaluating Pancreaticobiliary Diseases : T 2 - weighted Image and Magnetic Resonance Cholangiopancreatography
Journal of the Korean Radiological Society
;
: 515-524, 1999.
Article
in Korean
| WPRIM
| ID: wpr-101844
ABSTRACT
PURPOSE:
To evaluate the accuracy of T2-weighted imaging and MR cholangiopancreatography using the single shot fast spin-echo technique for evaluating pancreaticobiliary disease. MATERIALS ANDMETHODS:
B e t ween March and July 1997, axial and coronal T2-weighted images ( T E 8 0 -2 00 msec) and MR cholangiopancreatograms(TE800 -1 2 00 msec) were obtained in two ways [single slab (thickness30 -50 mm) and multislice acquisition under chemical fat saturation] using SSFSE pulse sequencing in 131 cases of suspected pancreati-cobiliary disease. The accuracy of SSFSE MR imaging was assessed in 89 lesions of 74 patients [male,48; female,26; age range, 3 0 -86 (mean,59)years] confirmed surgicopathologically(50 lesions in 39 patients) and clinically (39 lesions in 35 patients). Two radiologists reviewed the MR images and diagnosis was determined by consensus.RESULTS:
Correct diagnosis was confirmed in 84 of 89 lesions (94 %). Seven lesions were falsely interpreted, false positive and false negative results accounting for two and five cases, respective l y. Two pancreatic cancers were misdiagnosed as pancreatitis and a cancer of the proximal common bile duct(CBD) was interpreted as a distal CBD cancer. The sensitivity of SSFSE MR imaging for malignancy was 93 %. One CBD stone revealed by endoscopic retrograde cholangiopancreatography (ERCP) was not detected on MR images. In contrast, a stone in the CBD seen on MR images was not apparent on subsequent ERC P. Sensitivity and specificity for calculous disease were 96 % and 99.7 %, respective l y. A benign stricture of the ampulla of Vater was falsely interpreted as normal, and correct diagnosis was possible in two falsely diagnosed cases when MR images were rev i ewed retrospectively.CONCLUSION:
The combination of T2-weighted and cholangiographic images using SSFSE is an accurate method for diagnosing pancreaticobiliary diseases.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pancreatic Neoplasms
/
Pancreatitis
/
Ampulla of Vater
/
Bile
/
Magnetic Resonance Imaging
/
Retrospective Studies
/
Sensitivity and Specificity
/
Cholangiopancreatography, Endoscopic Retrograde
/
Constriction, Pathologic
/
Consensus
Type of study:
Diagnostic study
/
Practice guideline
/
Observational study
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
1999
Type:
Article
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