Contrast ultrasound in hepatocellular carcinoma at a tertiary liver center: First Indian experience

Figure 6 Post radiofrequency ablation lesion assessed with contrast ultrasound followed by dynamic magnetic resonance imaging showing no significant residual tumor. A: Hypoechoic lesion in segment VII of liver on B mode ultrasound (arrow); B: Post contrast ultrasound minimal peripheral enhancement (solid arrow) with feeding vessel sign (dotted arrow); C: Contrast ultrasound image showing mild peripheral enhancement without obvious residual tumor (arrow); D: Delayed scan post contrast on contrast enhanced ultrasound shows lesion as a hypoechoic defect (arrow); E: Arterial phase on axial T1 weighted magnetic resonance imaging (MRI) of liver without lesion hypervascularity (arrow); F: Portal venous phase on axial T1 weighted scans of liver on MRI show segment VII hypointense non enhancing lesion (arrow).