title: New technique using intraductal ultrasonography for the diagnosis of diseases of the pancreatobiliary system.
abstract: Intraductal ultrasonography (IDUS), a new technique for visualizing arterial structures, operates at an ultrasound frequency of 30 MHz to produce high resolution, cross-sectional images in real time. The purpose of this study was to provide a basis for interpreting IDUS images in vitro. We also attempted to determine the clinical usefulness of the IDUS system in diagnosing pancreatobiliary diseases in vivo. IDUS echograms of both the bile duct (BD) and main pancreatic duct (MPD) from autopsy specimens of 15 patients demonstrated three distinct layers with a fine reticular pattern in the pancreas in vitro. In clinical cases, the MPD and BD of four patients could be scanned by inserting the IDUS catheter via the major papilla without requiring endoscopic sphincterotomy. We hope that IDUS will become routine in scanning the BD and MPD to achieve early and accurate diagnoses of pancreatobiliary diseases.
authors.affiliation: Second Department of Internal Medicine, Nagoya University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Furukawa
authors.forename: Y
authors.initials: Y
authors.lastname: Naitoh
authors.forename: Y
authors.initials: Y
authors.lastname: Tsukamoto
authors.forename: M
authors.initials: M
authors.lastname: Mitake
authors.forename: M
authors.initials: M
authors.lastname: Yamada
authors.forename: A
authors.initials: A
authors.lastname: Ishihara
authors.forename: Y
authors.initials: Y
authors.lastname: Hirooka
authors.forename: T
authors.initials: T
authors.lastname: Satake
authors.forename: J
authors.initials: J
authors.lastname: Kanoh
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
mesh_terms: D002759:Adenoma, Bile Duct / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging*; D001652:Bile Ducts / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging*; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging*; D010195:Pancreatitis / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000379:methods