Abstract
Radiation therapy is one of the main methods of tumor treatment, with over 50% of patients opting for it during treatment. The optimal regimen of radiation therapy aims to increase the dose in the target area while decreasing the dose in normal tissue. Radiotherapy for liver tumors has seen significant development in recent years. Despite the technological progress and improved accuracy of radiotherapy, the path of radiation reaching the target area still passes through normal tissues. Although there is tolerance doses as a reference parameter for normal liver exposure in planning, radiation damage still occurs. In addition, when combination of radiation therapy with chemotherapy, targeted therapy and immunotherapy has been widely used in recent years, the occurrence of RILD still affects the implementation of other treatment programs. In this review, latest research results of RILD are discussed to better understand the mechanism and provide research directions for optimizing radiotherapy.