BEAM QUALITY ENSURING INSTRUMENTS AT THE GUNMA UNIVERSITY HEAVY-ION MEDICAL CENTER
BEAM QUALITY ENSURING INSTRUMENTS AT THE GUNMA UNIVERSITY HEAVY-ION MEDICAL CENTER
复制标题
群马大学重离子医疗中心的光束质量保证仪器
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Kawashima
中科院分区：
文献类型：
--
作者：
E. Takeshita;T. Kanai;S. Yamada;K. Yusa;M. Tashiro;H. Shimada;K. Torikai;A. Saito;Y. Kubota;A. Matsumura;M. Kawashima
自2010年群马大学重离子医疗中心开始使用碳束进行癌症治疗以来，到2011年底，接受治疗的患者总数增加到306人。本财政年度，已有164名患者得到治疗。为了控制医疗射束质量，即，位置、大小和束流强度，在高能束流传输线上安装监测装置。光束的位置和大小可以用屏幕监视器测量和调整，屏幕监视器由荧光屏和CCD摄像机组成。就在开始治疗之前，操作员通过靠近等中心点放置的条带线监视器测量来检查适当的射束位置。使用两个二次电子发射监测器放置在摆动磁铁的照射剂量进行控制。这种剂量监测器是有用的，因为对于高束流强度，它受复合效应的影响较小。介绍了各束流监测器的技术布局。
Since carbon beam based cancer therapy started at the Gunma University Heavy-ion Medical Center in the year 2010, the total number of treated patients increased to 306 by the end of 2011. This fiscal year, already 164 patients have been treated. In order to control the medical beam qualities, i.e., position, size and intensity of the beam, monitoring devices were mounted on the high-energy beam transport line. The beam position and size can be measured and tuned with a screen monitor, which consists of a fluorescent screen and a CCD camera. Just before starting the treatment, the operators check for a proper beam position by strip-line monitor measurements placed close to the isocenter. The irradiation dose is controlled using two secondary electron emission monitors placed before wobbling magnets. This dose monitor is helpful as for high beam intensities it’s less affected by the recombination effect. The technical layout of all beam monitors are described.