Feasibility of Temporal Lobe and Hippocampal Sparing IMRT in Cases of Nasopharyngeal Carcinoma – A Retrospective Analysis of Dosimetric Parameters and Replanning

Background: The temporal lobe and the hippocampus can receive high radiation doses due to their proximity to the target volumes in nasopharyngeal cancers radiation therapy. However, they are infrequently delineated during the planning process. The aim of this study was to retrospectively analyze doses received by these structures and compared with replanning. Material and methods: Twelve NPC patients treated between 2017–2023, were included. Temporal lobes and hippocampi were retrospectively contoured and replanned.