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Abstract #3656

Physiological Bile Flow in the Extrahepatic Bile Duct: Evaluation with Cine-Dynamic MR Cholangiopancreatography and a Spatially Selective Inversion-Recovery Pulse

Minoru Hayashida 1 , Akihiko Kanki 1 , Akira Yamamoto 1 , Tsutomu Tamada 1 , Kazuya Yasokawa 1 , Daigo Tanimoto 1 , Atsushi Higaki 1 , Yasufumi Noda 1 , and Katsuyoshi Ito 1

1 Diagnostic Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan

The purpose of this study was to determine the feasibility of directly and noninvasively visualizing physiological bile flow in the extrahepatic bile duct by means of non-pharmacologic cine-dynamic MRCP with a spatially selective inversion-recovery (IR) pulse and to assess the flow dynamic pattern of bile in the extrahepatic bile duct. Thirty-five patients without known pancreatobiliary diseases and 11 patients with dilatation of the extrahepatic bile duct were included. Non-pharmacological, cine-dynamic MRCP with a spatially selective IR pulse allowed direct and noninvasive visualization of antegrade/reversed bile flow in the extrahepatic bile duct, demonstrating that reversed bile flow is a physiological phenomenon.

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