The experimental study of correlation between the radiation dose and image quality in digital radiography

ZENG Yong-ming; et al

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The experimental study of correlation between the radiation dose and image quality in digital radiography

更新时间：2024-01-17

- The experimental study of correlation between the radiation dose and image quality in digital radiography
- Journal of Chongqing Medical University Vol. 34, Issue 11, Pages: 1517-1520(2009)
- 作者机构：
  
  1. 重庆医科大学附属第一医院放射科
  2. 重庆市疾病预防与控制中心
- 作者简介：
- 基金信息：
- DOI：
  CLC： R814.41
- Published：2009，
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[1]曾勇明,吴富荣,张志伟,罗天友,欧阳羽.数字X线摄影辐射剂量与图像质量相关性的实验研究[J].重庆医科大学学报,2009,34(11):1517-1520.

ZENG Yong-ming, et al. The experimental study of correlation between the radiation dose and image quality in digital radiography. [J]. Journal of Chongqing Medical University 34(11):1517-1520(2009)
[1]曾勇明,吴富荣,张志伟,罗天友,欧阳羽.数字X线摄影辐射剂量与图像质量相关性的实验研究[J].重庆医科大学学报,2009,34(11):1517-1520. DOI：

ZENG Yong-ming, et al. The experimental study of correlation between the radiation dose and image quality in digital radiography. [J]. Journal of Chongqing Medical University 34(11):1517-1520(2009) DOI：

摘要

目的:前瞻性研究不同X线辐射剂量与图像质量的相关性

以探索数字X线摄影（Digital radiography

DR）最适宜曝光量。方法:在仿真胸部体模中放置模拟网状、线状和结节病变结构。用125 kVp不同mAs

对体模及分辨率测试卡进行DR成像。4位放射医师分别对所有图像进行阅片评分

同时测量入射体表剂量（Entrance surface dose

ESD）、均方根（Root meansquar

RMS）和空间分辨率。结果:ESD随着mAs的增加会增加

而RMS随着mAs的增加会降低;ESD增加至一定量时

空间分辨率达到极限值。曝光指数（Exposure index

EI）值1 800以下的图像模拟微小结节显示不清

EI值2000以上的图像对模拟病变的检出高。结论:在保证DR图像质量的前提下

最优化的曝光剂量可以有效地减少辐射损伤。

Abstract

Objective:To prospectively research the correlation between the radiation dose and image quality in order to explore the optimization of exposure dose for digital radiography(DR).Methods:Simulated reticular

linear

and nodular structures were located in an anthropomorphic chest phantom.The phantom and resolution wedge were exposed by DR system with the same kilovoltage values(125 kVp)and different mAs sets.Four radiologists assessed all of the images.In addition

the entrance surface dose(ESD)

root mean squar(RMS)and resolution were measured.Results:ESD was increasing along with mAs’s enhancement

but RMS was decreasing when mAs was increasing.As long as the ESD increased to a certain degree

spatial resolution would go up to the limit.Images obtained with lower dose(EI<1 800)were obscure at the tiny nodular structure.Images of 2 000 EI value could show clearly the Simulated lesion.Conclusion:The optimization of exposure dose for DR imaging may effectively decrease radiation injuries under the precondition of DR image quality to be guaranteed.

关键词

数字X线摄影仿真体模模拟病变辐射剂量

Keywords

Digital radiographyAnthropomorphic phantomSimulated lesionradiation dose

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Related Author

金瑞

梁开运

张志伟

ZENG Yongming

Liu Sibin

Sun Mingjuan

Hu Jiuyi

刘志宏

Related Institution

第三军医大学新桥医院放射科

Department of Radiology, The Second Clinical Medical College of Yangtze University

重庆医科大学附属第一医院骨科

重庆医科大学附属第一医院神经内科

Department of Imaging，the First Affiliated Hospital of Kunming Medical University

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