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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Clin Gastroenterol Hepatol. 2014 Dec 3;13(7):1337–1345.e6. doi: 10.1016/j.cgh.2014.11.027

Figure 4. Figure 4a Correlation between BSC and MRI-PDFF (≥5%) in training and validation groups (n = 204), with the optimal BSC cut-off and corresponding ROC curve for the diagnosis of hepatic steatosis.

Figure 4

Figure 4

When BSC is correlated with MRI-PDFF (QUS frequency of 3 MHz), BSC exhibited a Spearman’s rho in the training and validation groups of 0.82 and 0.79, P < .0001, respectively. Overall, BSC ρ=0.80 (P < .0001). At MRI-PDFF ≥5%, the optimal BSC cut-off was 0.0038 1/cm-sr in the training set for the diagnosis of NAFLD.

Figure 4b ROC curve for the diagnosis of hepatic steatosis with BSC as defined by MRI-PDFF ≥5% at the optimal QUS BSC cut-off in the training group. Backscatter coefficient of 0.0038 1/cm-sr exhibits an AUC of 0.98.