Abstract #1700

Impacts of different b and TE values on quality of 3T diffusion-weighted imaging of the liver using a high gradient magnetic field: feasibility of ultrahigh b value of 3000

Keita Fukushima¹, Katsuhiro Sano², Haruhiko Machida³, Toshiya Kariyasu³, Isao Miyazaki¹, Tatsuya Yoshioka¹, Sanae Takahashi¹, Saori Yuda¹, Yuta Shimizu¹, Takayuki Yonaha¹, Akihito Nakanishi¹, Hiroshi Kusahara⁴, Youhei Matsuoka⁴, Miho Kitamura⁴, Takao Yamamoto⁴, and Kenichi Yokoyama³

¹Kyorin University Hospital, Tokyo, Japan, ²Diagnostic Imaging, Saitama medical University International medical Center, Saitama, Japan, ³Kyorin University School of Medicine, Tokyo, Japan, ⁴CANON MEDICAL SYSTEMS CORPORATION, Otawara, Japan

Diffusion-weighted imaging (DWI) with an ultrahigh b value is expected to improve assessment of tumor cellularity and fluid viscosity in the liver but can decrease signal-to-noise ratio (SNR) of the hepatic parenchyma. A state-of-the-art 3T MR scanner with the maximal gradient magnetic field of 100 mT/m can achieve sufficient SNR on liver DWI even at ultrahigh b value of 3000 with use of short TE. The present study using our original phantom and healthy volunteers shows that use of shorter TE significantly increased the SNR with preserved ADC value on DWI even at ultrahigh b value of 3000.

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