中山大学学报（医学科学版）2023，Vol.44Issue(1)：131-137,7.
鼻咽癌螺旋断层调强放疗图像引导策略
Image-guided Strategy of Intensity-modulated Radiotherapy in Helical Tomography for Nasopharyngeal Carcinoma
摘要
Abstract
[Objective] This study aimed to analyze the difference in setup error before and after correction of systemat-ic error. To determine the most appropriate image-guided strategy during HT treatment, we use different scanning ranges and image-guidance frequencies in patients with nasopharyngeal carcinoma (NPC) treated with helical tomotherapy (HT).[Methods] Fifteen patients with NPC who received HT treatment in Sun Yat-sen University Cancer Center from October 2019 to February 2020 were selected. Megavoltage computed tomography (MVCT) scanning was performed before each treatment. After five times of radiotherapy, system-error correction was performed to adjust the setup center. The setup er-rors before and after the correction of systematic errors, as well as the setup errors of different scanning ranges and differ-ent scanning frequencies, were collected for analysis and comparison.[Results] When comparing the setup errors before and after the correction of systematic error, the differences in setup errors in the left–right (LR), superior–inferior (SI), and anterior–posterior (AP) directions were statistically significant (P<0.05).The different scanning ranges of "na-sopharynx + neck" and "nasopharynx" were compared, and a statistically significant difference was found in yaw rotational errors (P<0.05). In the comparison of daily and weekly scan frequency after system-error correction, a significant differ-ence was found in AP direction (P<0.05).[Conclusion] During radiotherapy for NPC, the systematic error can be correct-ed according to the first five setup errors, and then small-scale scanning was selected for image-guided radiotherapy every day.关键词
鼻咽癌/螺旋断层放疗/影像引导放射治疗/摆位误差Key words
nasopharyngeal carcinoma/HT/image-guided radiotherapy/setup error分类
医药卫生引用本文复制引用
何梦雪,许佩珣,黄虹,陈炫光,何汇朗,张梓贤,刘慧,许森奎,姚文燕..鼻咽癌螺旋断层调强放疗图像引导策略[J].中山大学学报（医学科学版）,2023,44(1):131-137,7.基金项目
广东省医学科学技术研究基金(A2020621,A2017613) （A2020621,A2017613）
