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![Assessment of response to liver directed radiation-based therapies: Current guidelines, challenges, and future directions](https://image.oaes.cc/2873b637-e4cb-4913-b722-470f11e30900/5378.fig.3.jpg)
Figure 3. 65-year-old male, cirrhosis complicated by hepatocellular carcinoma. A: Pretreatment computer tomography (CT) shows a 2.2 cm arterial phase hyperenhancing mass in segment 4A/8, with portal venous phase washout, consistent with hepatocellular carcinoma (LR-5). B: Three months CT follow-up after SBRT. Note marked arterial phase hyperenhancement in the treatment zone (asterisks). C: Nine-month magnetic resonance imaging follow-up images show persistent arterial phase hyperenhancement, which may create confusion in the assessment of response, although the decrease in lesion size favors response.