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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Charge Coupled Device Camera-Scintillator System for Two Dimensional Proton Dose Measurements
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Charge Coupled Device Camera-Scintillator System for Two Dimensional Proton Dose Measurements

机译：用于二维质子剂量测量的电荷耦合器件照相机-闪烁器系统

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摘要

A two-dimensional dosimeter composed of a charge coupled device (CCD) camera and a scintillating screen has been tested for measuring the dose distributions of therapeutic proton beams in situ. The dosimeter is the main component of the dosimetry system designed for the quality assurance of scanning beams in the course of patient treatments. A thin-wall parallel plate ionization chamber was built as part of the system to scale the beam currents, and a collimator and variable-thickness phantom being the other components. The system has been tested using a 40 MeV proton beam in a nontherapeutic beam line. The light output from the screen was linear within 0.1% at the typical dose rates of 1-2 Gy/min. The depth dose distributions were measured using the CCD camera system, and agreed well with the measurements by a calibrated ionization chamber. The CCD camera was also used to measure the beam intensity distributions produced with a Cu scatterer in the beam line. The comparison with the results of Monte Carlo simulations using MCNPX was useful for validating the code.
机译：已经测试了由电荷耦合器件（CCD）相机和闪烁屏组成的二维剂量计，用于就地测量治疗性质子束的剂量分布。剂量计是剂量测定系统的主要组成部分，该剂量测定系统旨在确保患者治疗过程中扫描光束的质量。薄壁平行板电离室是该系统的一部分，用于调节电子束电流，准直仪和可变厚度的体模是其他组件。该系统已在非治疗性束线中使用40 MeV质子束进行了测试。屏幕的光输出在1-2 Gy / min的典型剂量率下在0.1％以内是线性的。使用CCD相机系统测量深度剂量分布，并与校准的电离室的测量结果很好地吻合。 CCD摄像机还用于测量光束线中由Cu散射体产生的光束强度分布。与使用MCNPX进行的蒙特卡洛模拟的结果进行比较有助于验证代码。

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