Medline ® Abstracts for References 2-4
of 'Magnetic resonance cholangiopancreatography'
Current status of MR cholangiopancreatography.
Reinhold C, Bret PM
AJR Am J Roentgenol. 1996;166(6):1285.
MR cholangiopancreatography (MRCP) is an exciting new application of MR imaging that combines the advantages of projectional and cross-sectional imaging techniques. The technique of MRCP is in its infancy, and it is not yet known whether it will replace traditional techniques such as diagnostic ERCP or remain an adjunctive diagnostic tool. This article critically reviews the various techniques advocated for MRCP and discusses the potential role of MRCP in evaluating the pathology of the biliary tract and pancreas.
Department of Diagnostic Radiology, Montreal General Hospital, McGill University, Quebec, Canada.
Magnetic resonance cholangiopancreatography.
Bret PM, Reinhold C
Magnetic resonance (MR) cholangiopancreatography is a new, noninvasive method of assessing the biliary tract and pancreatic duct. MRCP sequences are based on heavily T2-weighted pulse sequences, resulting in the bile ducts and pancreatic duct having very high signal intensity. Preliminary results indicate that the results of MRCP in most biliary tract diseases are similar to those of more invasive techniques of direct cholangiography, such as, endoscopic retrograde cholangiopancreatography.
Dept. of Diagnostic Radiology, Montreal General Hospital, McGill University, Quebec, Canada.
Dilated biliary tract: evaluation with MR cholangiography with a T2-weighted contrast-enhanced fast sequence.
Wallner BK, Schumacher KA, Weidenmaier W, Friedrich JM
A heavily T2-weighted gradient-echo sequence was used for magnetic resonance (MR) imaging of the biliary system in five healthy volunteers and 13 patients with obstructive jaundice. Images were obtained in the sagittal and coronal planes during sequential breath-hold intervals and were post-processed by using a maximum-intensity projection algorithm. The extrahepatic and intrahepatic bile ducts were well visualized in 11 patients. The level of obstruction and the grade of dilatation were depicted with MR cholangiography. However, the cause of obstruction could be determined with MR cholangiography in only eight cases. The part of the biliary system below the obstruction could not be visualized with MR cholangiography. In the volunteers, MR cholangiography could demonstrate the anatomy of the biliary tract in only two subjects. Possible causes for this phenomenon are the limited spatial resolution of MR imaging, partial volume effects, or flow within the bile ducts. MR cholangiography may be a useful adjunctive tool for noninvasive evaluation of patients with obstructive jaundice. However, further technical advances are necessary to improve image quality.
Department of Radiology, University of Ulm, Germany.