Quality Assurance Supporting System for Digital X-ray Image Utilizing Filing System of DICOM-3.0

利用DICOM-3.0归档系统的数字X射线图像质量保证支持系统

• 批准号: 13671973
• 负责人: KATOH Tsuguhisa
• 金额: $ 2.05万
• 依托单位: Tokyo Metropolitan University of Health Sciences (TMUHS)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13671973/
• 关键词: Digital X-ray Image; Quality Assurance; Radiation Dosimetry; Imaging Plate; Output X-ray Intensity; Half Value Layer; Tube Potential; Film Badge Case; X線の線質; 品質管理支援ソフトウェア; DICOM規格; X線量; ディジタルX線撮影

A quality control (QC) system for the quality assurance (QA) of digital x-ray image was developed. The system would support the QC procedures with the least labor of staff and cost. The main outcomes of the development were as follows.1)Measurement of output x-ray intensity, half value layer (HVL) and tube potential utilizing computed radiography(CR) systemAn imaging plate (IP) for intraoral radiography was inserted into a film badge case for personal dosimeter with filters made of aluminum, copper and tin on the measuring windows. This system could measure the output x-ray intensity with an error of ±5%, the HVL with an error of ±0.17mm and the tube potential with an error of ±2%.2)Method for evaluation of IP's degradationA method for the detection of the scratch noise of IP for intraoral radiography was developed. An IP was uniformly radiated by x-rays and scanned. A digital image processing software was developed to get a binary image of the scratch noise.3)Development of QA supporting information systemA QA supporting information system based on DICOM standard was developed. Based on the object oriented analysis of devices and materials concerning QC, the structure of the information objects and performance of the servers and clients were defined. As a result, the specification was applicable not only to dental radiography but also to all the modality used in radiology.

开发了一套数字化X光图像质量保证(QA)的质量控制系统。该系统将以最少的人力和成本支持QC程序。1)利用计算机X线摄影(CR)系统测量输出X射线强度、半值层(HVL)和管电位。将口内摄影成像板(IP)插入个人剂量计的胶片标记盒中，测量窗上由铝、铜和锡制成的滤光片。该系统可以测量输出X射线强度，误差为±5%，测量管子电势的误差为±0.17 mm，测量误差为±2%。2)建立了一种检测口腔内摄影用激元划痕噪声的方法。对IP进行均匀X射线照射和扫描。开发了数字图像处理软件，实现了对划痕噪声的二值化处理。3)开发了基于DICOM标准的质检辅助信息系统。基于对QC相关设备和材料的面向对象分析，定义了信息对象的结构以及服务器和客户端的性能。因此，该规范不仅适用于牙科放射照相，而且适用于放射学中使用的所有设备。

项目成果

加藤二久, 西谷源展, 小山修司 他: "診断領域X腺様線量計のトレーサブルシステム構築にむけて"日本放射線技術学会誌. 57(12). 1438-1443 (2001)

Futsuhisa Kato、Gennobu Nishitani、Shuji Koyama 等人：“构建用于诊断区域 X 腺体剂量计的可追踪系统”日本放射线技术学会杂志 57(12) (2001)。

T.Katoh, K.Imamura, T.Matsumoto: "Current Topics on Quality Assurance of X-ray Diagnosis"Proc.3rd KJMP, 2nd Asia Oceania Cong.Med.Phys.. 13-16 (2002)

T.Katoh、K.Imamura、T.Matsumoto：“X 射线诊断质量保证的当前主题”Proc.3rd KJMP，第 2 届亚洲大洋洲 Cong.Med.Phys.. 13-16 (2002)

T.Katoh, K.Iwamura, T.Matumoto: "Qurrent Topics of X ray Diagnosis in Japan"Proc. 2nd Asia Oceania Cong. Med. Phys.. 13-16 (2002)

T.Katoh、K.Iwamura、T.Matumoto：“日本 X 射线诊断的当前主题”Proc。

T.Katoh, H.Saitoh, et al.: "Computer Aided Quality Assurance for Medical Imaging : Proposal of DICOM QA"World Cong.Med.Phys.Biomed.Engin.2003 Sydney. TH TR6 168 (2003)

T.Katoh、H.Saitoh 等人：“医学成像计算机辅助质量保证：DICOM QA 提案”World Cong.Med.Phys.Biomed.Engin.2003 悉尼。

加藤二久, 加藤洋, 他: "東京都立保健科学大学における診断X線用線量計校正の再現性"医学物理. 22 Suppl.1. 260-262 (2002)

Futsuhisa Kato、Hiroshi Kato 等人：“东京都健康科学大学诊断 X 射线剂量计校准的再现性”医学物理学 22 Suppl.1 (2002)。