中国医疗设备Issue(9)：159-161,3.DOI:10.3969/j.issn.1674-1633.2013.09.063
16排螺旋CT在食管癌术后放疗中的应用
Deployment of 16-Row Spiral CT in Post-Operative Radiotherapies for Esophageal Neoplasms
李雪南 1修霞 1李高峰1
作者信息
- 1. 卫生部北京医院 放疗科，北京100005
- 折叠
摘要
Abstract
Objective To explore the clinical effects and advantages of large-aperture 16-row spiral CT scanning in post-operative positioning-simulated radiotherapies for esophageal neoplasms. Methods positioning simulation was performed respectively in two groups of 20 patients with philips pQS single-row CT scanner and philips Brilliance Big Bore 16-row spiral CT scanner. All the patients were required to take postures like the supine position, double-upper-limb uplift and double-upper-limb cross with ifxation of the vacuum negative-pressure air cushion so as to receive the CT scanning. Then, location of the isocenter needed to be determined in the positioning-simulated workstation through deployment of the laser position system, adjustment of the laser lamp, bed placement and isocenter-marks-making on the physical surface. After treatment plans were generated by the treatment plan system, scanning and adjustment validation were performed with Varian EX on-board image (OBI) and cone beam CT (CBCT) system so as to compare and analyze the validation errors. Results Large-aperture 16-row spiral CT displayed the characteristics of higher time, spatial and density resolution, which improved the optimization design of the radiation ifeld and the dose distribution as well as the accuracy of radiation protection in post-operative radiotherapies for esophageal neoplasms. In comparison of validation errors, superiority was achieved by large-aperture 16-row spiral CT over single-row spiral CT (t=-4.63, 3.21, 6.74:p<0.05). Conclusion Deployment of large-aperture 16-row spiral CT in positioning-simulated radiotherapies greatly improved the accuracy of radiotherapy localization and provided the guarantee for accurate treatment plan designing and precise treatment. With the advancement of radiation equipment, it could be deployed to enhance the local control rate of radiated-tumors and the survival rate in post-operative radiotherapies for the esophageal neoplasms patients.关键词
大孔径16排螺旋CT/模拟定位/术后放射治疗/食管癌/放疗定位Key words
large-aperture 16-row spiral CT/positioning simulation/post-operative radiotherapies/esophageal neoplasms/radiotherapy positioning分类
医药卫生引用本文复制引用
李雪南,修霞,李高峰..16排螺旋CT在食管癌术后放疗中的应用[J].中国医疗设备,2013,(9):159-161,3.
