Measurement of repositioning accuracy during fractionated stereotactic radiotherapy for intracranial tumors using noninvasive fixation of BrainLAB radiotherapy equipment
Measurement of repositioning accuracy during fractionated stereotactic radiotherapy for intracranial tumors using noninvasive fixation of BrainLAB radiotherapy equipment
复制标题
DOI：
10.1016/j.ijrobp.2006.02.062
复制
发表时间：
2006-01-01
影响因子：
7
通讯作者：
Honda, Norinari
中科院分区：
文献类型：
--
作者：
Takahashi, Takeo;Nishimura, Keiichiro;Honda, Norinari
目的：应用无创固定面罩装置进行立体定向放疗。分式SRT是有用的，因为它对正常组织的损伤较小，因此可移动的无创固定装置的定位精度很重要。我们检查了BrainLAB可移动无创固定装置在计算机断层扫描（CT）坐标上的重新定位准确性，以制定治疗计划。方法与材料：选取13例头部SRT患者为研究对象。使用的可移动无创固定面罩装置为BrainLAB系统的无创固定装置。使用Winston-Lutz测试膜评估照射装置的精度，通过比较相对坐标确定的治疗计划和重新定位时间在X、Y和Z坐标上的距离差异来检查固定装置的重新定位精度。使用标准点和测试点的相对坐标进行评估。结果：该仪器辐照中心精度在0.5 mm以内。在13例患者中，治疗计划与复位手术之间的距离差为0.1 ~ 2.080 mm，使用固定装置的患者中有84.6%的患者精确度在2 mm以内。结论：BrainLAB无创SRT固定装置可用于常规治疗，精度高。(c) 2006爱思唯尔公司
Purpose: A noninvasive fixation mask device is used for stereotactic radiotherapy (SRT) in our hospital. Fractionated SRT is useful because it results in less damage to normal tissues, for which the positioning accuracy of the removable noninvasive fixation device is important. We examined the repositioning accuracy of a BrainLAB removable noninvasive fixation device on the coordinates of computed tomography (CT) for treatment planning.Methods and Materials: The subjects were 13 patients who had undergone head SRT. The removable noninvasive fixation mask device used was a noninvasive fixation device for the BrainLAB system. The accuracy of the irradiation apparatus was evaluated using Winston-Lutz test film, and the repositioning accuracy of the fixation device was examined using differences in the distance on the X, Y, and Z coordinates between the treatment planning and repositioning times determined by comparing the relative coordinates. The evaluation was performed using the relative coordinates of the standard and test points.Results: The accuracy of the irradiation center with the apparatus was within 0.5 mm. In the 13 patients, the difference in the distance between the treatment planning and repositioning procedures ranged from 0.1 to 2.080 mm, and an accuracy of within 2 mm was obtained in 84.6% of the patients using the fixation device.Conclusion: The BrainLAB noninvasive SRT fixation device was considered useful for routine treatment with high accuracy. (c) 2006 Elsevier Inc.