Development of Optical Computed Tomography for Evaluation of the Absorbed Dose of the Dyed Gel Dosimeter
Development of Optical Computed Tomography for Evaluation of the Absorbed Dose of the Dyed Gel Dosimeter
复制标题
开发用于评估染色凝胶剂量计吸收剂量的光学计算机断层扫描
DOI：
10.1007/978-981-10-9023-3_107
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Noto Kimiya
中科院分区：
文献类型：
--
作者：
Wada Takuya;Nakayama Kazuya;Takemura Akihiro;Yamamoto Hiroaki;Kojima Hironori;Isomura Naoki;Noto Kimiya
光学计算机断层扫描（光学CT）是染色凝胶剂量计的阅读装置。我们正在开发的光学CT的三维辐射吸收剂量分布的评价染色凝胶剂量计。我们用无色结晶紫制备染色凝胶，并将染色凝胶装在小瓶中。用10 MV X射线束以100-2000 MU照射染色凝胶剂量计。我们开发的光学CT由作为光源的液晶监视器VL-176 SE（FUJITSU，Japan）和照相机uEye XS（iDS，德国）组成。染色的凝胶剂量计在水箱中用步进电机ST-42 BYH 1004-5013（MERCURY MOTOR，中国）以每0.9°的步长旋转，并且每次旋转进行400次投影。使用图像处理软件Plastimatch从投影图像重建体积数据。分析了重建图像中染色凝胶剂量计的吸收剂量与信号值之间的相关性。所研制的光学CT可重建染色凝胶剂量计的图像，重建图像中染色凝胶剂量计的信号值与剂量呈线性关系，直至20戈伊。
Optical computed tomography (optical CT) is a reading device of the dyed gel dosimeters. We are developing the optical CT for the evaluation of three dimensional radiation absorbed dose distribution in the dyed gel dosimeters. We made dyed gel with leuco crystal violet and the dyed gel will be contained in vials. The dyed gel dosimeters were irradiated with 10 MV X-ray beam at 100–2000 MU. The optical CT we developed was consists of a liquid crystal monitor VL-176SE (FUJITSU, Japan) as a light source and a camera uEye XS (iDS, Germany). The dyed gel dosimeter was rotated by a step of every 0.9° with the stepper motor ST-42BYH 1004-5013 (MERCURY MOTOR, China) in a water tank and be taken 400 projections per rotation. Volume data was reconstructed from the projection images with the image processing software Plastimatch. The correlation between the absorbed dose and signal values of the dyed gel dosimeters in the reconstructed image was analyzed. The developed optical CT could reconstructed the images of the dyed gel dosimeters and the signal values of the dyed gel dosimeters in the reconstructed images had linear response related to the dose up to 20 Gy.