权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Application of Imaging Plate to Quality Control of Heavy Ion Therapy

成像板在重离子治疗质量控制中的应用

基本信息

批准号：
14570872
负责人：
ABE Shinji
金额：
$ 2.24万
依托单位：
Ibaraki Prefectural University of Health Sciences
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14570872/
关键词：
imaging plate heavy ion radiography characteristic curve multiple scattering scattering radiograph heavy ion therapy quality control residual range distribution コントラスト伝達関数周波数特性エッジ強調 CCDカメラ重粒子線CT 電子密度分布電子密度分解能重荷電粒子線CT 解

项目摘要

The aim of this research project is to fundamentally study applications of imaging plate (IP) to quality control of the heavy ion radiation therapy.In fiscal year 2002, we evaluated the image quality of the heavy ion radiography with IP as a tool for quality control of the heavy ion radiation therapy. Characteristic curves of IP for heavy ions were straight lines, similarly to X-rays. The lateral straggling of heavy ion passing through the material was approximately represented as a Gaussian distribution.In fiscal year 2003, we discussed the measurement methods of residual rage distribution with the IP and the intensifying screen-II CCD camera system. The two methods lead to similar results. Furthermore, the electron density resolution of heavy ion CT image was estimated by the 1 dimensional Wiener spectrum obtained from the fluctuation of residual range distribution for a projection angle. The result is consistent with the one obtained form the density resolution phantom. Therefore, it was considered that the measurement with the IP was useful.In fiscal year 2004, we evaluated the image quality of the heavy ion scattering radiography with IP. A square wave chart (Model No.1, KYOKKO) was used in the experiment. As a result, the image resolution was able to be superior to the conventional heavy ion radiography due to an edge enhancement arose from the scattering of heavy ions with the material.

本研究的目的是从根本上研究成像板（IP）在重离子放射治疗质量控制中的应用，在2002年度，对作为重离子放射治疗质量控制工具的IP重离子放射摄影的图像质量进行了评价。重离子激发极化的特征曲线与X射线相似，均为直线。2003年，我们讨论了用IP和增感屏-Ⅱ CCD相机系统测量重离子在材料中的横向离散分布的方法。这两种方法导致相似的结果。此外，利用剩余射程分布随投影角变化的一维Wiener谱估计了重离子CT图像的电子密度分辨率。其结果与密度分辨体模所得结果一致。因此，我们认为使用IP进行测量是有用的。在2004财政年度，我们评估了使用IP的重离子散射射线照相术的图像质量。实验中使用方波图（型号1，KYOKKO）。结果，由于重离子与材料的散射引起的边缘增强，图像分辨率能够上级于传统的重离子射线照相术。