title: MR cholangiopancreatography using HASTE sequences.
abstract: OBJECTIVE
  The aim of this pictorial review is to describe applications of cholangiopancreatography (MRCP) using half-Fourier (HASTE) MR sequences.
  
  
  METHODS
  350 patients were imaged over a four-year period with a 1.54 Tesla Siemens Vision scanner and a phased array body coil. The HASTE MR sequence was applied in multiple planes with an acquisition time of 13 seconds allowing breath hold techniques. In addition, a single-shot technique provided single slice acquisitions with a thickness of 20 mm. A chemical fat suppression algorithm reduced intra-abdominal MR high signal.
  
  
  RESULTS
  HASTE MRCP accurately determines the presence of level of biliary obstruction in up to 97% of patients. Common bile duct stones are detected with a sensitivity of 93%. Acute cholecystitis is depicted on HASTE MR as pericholecystic high signal in 41/45 (91%) patients and gall stones are detected with a 93% sensitivity.
  
  
  CONCLUSIONS
  HASTE MRCP offers a non-invasive, rapid imaging method to evaluate the gallbladder, common bile duct and pancreas. Its multi-planar, fluid sensitive capabilities are of particular value in detecting common bile duct stones and acute cholecystitis.
authors.affiliation: Department of Imaging, Johns Hopkins Bayview Medical Center, Baltimore, MD 21224, USA.
authors.forename: K
authors.initials: K
authors.lastname: Van Epps
authors.forename: F
authors.initials: F
authors.lastname: Regan
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D001649:Bile Duct Diseases / Q000000981:diagnostic imaging*; D002758:Cholangiography / Q000379:methods*; D005260:Female; D005583:Fourier Analysis; D042882:Gallstones / Q000175:diagnosis; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000175:diagnosis; D012680:Sensitivity and Specificity