Abstract #1788

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

Shintaro Ichikawa¹, Utaroh Motosugi¹, Marie-Luise Kromrey^1,2, 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 Star_navi+ and LAVA Star_navi-) and Cartesian LAVA with navigator echoes (Cartesian LAVA_navi+). LAVA Star_navi+ showed better image quality, liver edge sharpness, and hepatic vein clarify than others. The images of LAVA Star_navi+ had less streak artifacts than those of LAVA Star_navi- 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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