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Abstract #4743

Assessing Liver Fibrosis with Diffusion-weighted MRI-based Virtual Elastography: Comparison with US Shear-wave Elastography

Li Yang1, Mengsu Zeng2, and Caixia Fu3
1Department of Radiology, Zhongshan Hosptial of Fudan University, Shanghai, China, 2Zhongshan Hospital of Fudan University, Shanghai, China, 3MR Application Development, Siemens Shenzhen Magnetic Resonance Ltd, Shenzhen, China

Synopsis

Keywords: Liver, Liver

Motivation: Recent reports have shown a strong correlation between tissue water diffusivity and liver elasticity.

Goal(s): The aim to this study was to compare the performance of DW MRI-based virtual shear modulus (µDiff) and liver stiffness (LS) measured using US shear-wave elastography (SWE) for staging liver fibrosis.

Approach: We retrospectively analyzed µDiff and LS on the right liver lobe in 124 patients.

Results: Our results showed the area under the curve of LS was significantly higher than that of µDiff (0.96 vs. 0.87, P<0.05) for advanced fibrosis. However, no significant difference was found between LS and µDiff (0.88 vs. 0.79, P>0.05) for significant fibrosis.

Impact: Although DW MRI-based virtual shear modulus showed significant correlation with the histologic stages of fibrosis, it was inferior than liver stiffness measured using US shear-wave elastography for staging liver fibrosis.

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