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Abstract #1034

Alternative linear post-processing method for calculating viscoelastic parameters of the liver from multi-frequency MR elastograms.

Akira Yamada1, Hayato Hayashihara2, Yoshihiro Kitoh2, Yasuo Adachi2, Aya Shiobara2, and Yasunari Fujinaga1

1Radiology, Shinshu University School of Medicine, Matsumoto, Japan, 2Shinshu University Hospital, Matsumoto, Japan

An alternative linear post-processing method that enables fast and precise calculation of viscoelastic parameters (viscosity, η and elasticity, μ) of the liver from multi-frequency MR elastograms has been shown in this study. Correlation of viscoelastic parameters between linear and non-linear calculation methods was significantly high in phantom (r = 0.980 for μ, r = 0.983 for η) and patients study (r = 0.932 for μ, r = 0.935 for η). Calculation speed by linear method (0.42 s) was significantly faster than that by non-linear method (47.14 s). The proposed method will promote clinical application of viscoelastic analysis of liver diseases using MR elastography.

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