Figure 9b:

Imaging findings after stereotactic body radiation therapy in a 56-year-old woman. (a) Pretreatment axial MR image shows a 3.4-cm LR-5/OPTN 5B hepatocellular carcinoma (HCC) (arrow) in segment 7 of liver with arterial phase hyperenhancement (APHE) and “washout” (b). (c) Three months after SBRT, the treated HCC measures 3.2 cm and no longer demonstrates APHE, confirmed with subtraction images (not shown) (mRECIST CR, LR-TR nonviable). CR = complete response, LR = LI-RADS, mRECIST = modified Response Evaluation Criteria for Solid Tumors, OPTN = Organ Procurement and Transplantation Network, PV = portal venous, SBRT = stereotactic body radiation therapy, TR = treatment response.