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Abstract #1788

Breath hold free hepatobiliary phase imaging: usefulness of stack-of-stars acquisition

Shintaro Ichikawa1, Utaroh Motosugi1, Marie-Luise Kromrey1,2, Daiki Tamada1, Tetsuya Wakayama3, Kang Wang4, Ty Cashen4, Ali Ersoz5, and Hiroshi Onishi1

1Department of Radiology, University of Yamanashi, Chuo-shi, Japan, 2Department of Diagnostic Radiology and Neuroradiology, University Medicine Greifswald, Greifswald, Germany, 3MR Collaboration and Development, GE Healthcare, Tokyo, Japan, 4MR Collaboration and Development, GE Healthcare, Madison, WI, United States, 5MR Engineering, GE Healthcare, Waukesha, WI, United States

We compared the quality of hepatobiliary phase (HBP) imaging using the prototype pulse sequences stack-of-stars liver acquisition with volume acceleration (LAVA) (LAVA Star) with or without navigator echoes (LAVA Starnavi+ and LAVA Starnavi-) and Cartesian LAVA with navigator echoes (Cartesian LAVAnavi+). LAVA Starnavi+ showed better image quality, liver edge sharpness, and hepatic vein clarify than others. The images of LAVA Starnavi+ had less streak artifacts than those of LAVA Starnavi- The use of both stack-of-stars acquisition and navigator echo is the best solution to obtain HBP images without breath hold in terms of quality of images.

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