Figure 1

Dosimetric distribution in radiotherapy for nasopharyngeal carcinoma. (a) Sagittal and axial magnetic resonance imaging images were used to locate the tumor. (b) Overlay of an isodosimetric map on representative axial and sagittal computed tomography images showing the dose-dependent effect of radiation at the near temporal, frontal, and anterior hippocampal areas. The deposit dose at the hippocampus was 2–14 Gy, depending on the distance from the tumor.