2017年中华医学会放射治疗技术学学术年会纪要

Preliminary results of the exposed dose of head, body and tail of the hippocampus in nasopharyngeal carcinoma patients treated with intensity modulated radiotherapy

2017年中华放射肿瘤治疗技术学学术年会于8月25—27日在湖南长沙市成功召开。本次会议由中华医学会、中华放射肿瘤治疗学分会主办，中南大学湘雅医院承办。郎锦义教授、王绿化教授担任大会主席，林承光主任技师、申良方教授担任大会执行主席。大会共收到论文242篇，来自全国各地的600多名放射治疗师参加了会议。

Objective To analyze the radiation doses to the head, body, and tail of the hippocampus in intensity-modulated radiotherapy （IMRT） for nasopharyngeal carcinoma （NPC）. MethodsTen NPC patients treated with IMRT were selected, and the head, body, and tail of both hippocampi were delineated on T1-weighted images. The doses to the hippocampus were then analyzed. WAIS-CR speech test Resutls were tested by paired sample t-test. Resutls The mean doses to left and right hippocampi were 1147±976 cGy and 1011±602 cGy, respectively. The mean doses to the head, body, and tail of the left hippocampus were 1739±1317 cGy, 890±982 cGy, and 547±688 cGy, respectively （P=0.042）;the mean doses to the head, body, and tail of the right hippocampus were 1691±942 cGy, 744±483 cGy, and 531±603 cGy, respectively （P=0.002）.The dose to the hippocampus decreased from the head to the tail, and the irradiated volume also decreased as the dose varied. Conclutions The dose to hippocampus decreases from the head to the tail in NPC patients treated with IMRT, which is worthy of attention.