Figure 4.

Receiver-operating characteristic (ROC) curves for vascular index (VI) and quantified contrast-enhanced ultrasonography (qCEUS) parameters. (A) ROC curves of vascular index (VI). (B) ROC curves of peak intensity (PI). (C) ROC curves of area under the curve (AUC). (D) ROC curves of wash-in area under curve (iAUC). (E) ROC curves of wash-out area under curve (oAUC). (F) ROC curves of the wash-in rate (WiR). (G) ROC curves of mean intensity (Mean Int). (H) ROC curves of standard deviation (STD).