Acoustic radiation force impulse elastography for hepatocellular carcinoma-associated radiofrequency ablation

Figure 1 Hepatocellular carcinoma in a 59-year-old man with underlying liver cirrhosis. A: T2-weighted magnetic resonance (MR) image shows a high signal intensity mass in segment 2 of the liver (arrow); B: On dynamic study, the mass revealed an arterial enhancement; C: Delayed wash-out, which is a typical finding of hepatocellular carcinoma (HCC) (arrow); D: On B-mode image, the HCC appears as a well defined, hypoechoic mass and the HCC have a bright (softer) color on the acoustic radiation force impulse (ARFI) image (arrows); E: The shear wave velocity (SWV) of HCC is 2.07 m/s; F: SWV of surrounding cirrhotic hepatic parenchyma measures 3.83 m/s. GEN: General; SC: Spatial compounding; Vs: Velocity.