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Abstract #3624

Non-contrast-enhanced MR Arteriography with Balanced Steady-State Free-Precession Sequence and Time-Spatial Labeling Inversion Pulses: Comparison of Imaging with Flow-in and Modified Flow-out Methods

Hiroyoshi Isoda 1 , Akihiro Furuta 1 , Rikiya Yamashita 1 , Tsuyoshi Ohno 1 , Seiya Kawahara 1 , Hironori Shimizu 1 , Aki Kido 1 , Koji Fujimoto 1 , Yasutaka Fushimi 1 , Kaori Togashi 1 , and Hiroshi Kusahara 2

1 Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan, 2 Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan

Long TI of a selective tagging pulse in flow-out method is favorable for peripheral vessel visualization to maintain background signal suppression using a nonselective inversion recovery pulse. The aim of this study was to compare and evaluate images of non-contrast-enhanced MR arteriography acquired with two different methods, the flow-in and modified flow-out methods using the selective tagging pulse with long TI. The vessel-to-liver contrast and the quality of vessel visualization were better with the modified flow-out than flow-in method. Non-contrast-enhanced MR arteriography with the modified flow-out method improved the visualization of the intrahepatic artery in comparison with the flow-in method.

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