医疗卫生装备2013，Vol.34Issue(5)：108-110,3.DOI:10.7687/J.ISSN1003-8868.2013.05.108
DR摄片管电压与影像质量和辐射剂量的相关性研究
Effects of kV on Image Quality and Radiation Dose for Digital Radiography
赵洪波 1曲良勇 2张沉石 1刘士远1
作者信息
- 1. 上海长征医院影像科,上海200003
- 2. 上海中冶医院放射科,上海200941
- 折叠
摘要
Abstract
Objective To study the correlation of kV with image quality and radiation dose for digital radiology(DR).Methods Quality assurance(QA) was performed with BARRACUDA system to make sure DR x-ray machine was in good condition.On condition that CDRAD 2.0 phantom was used,radiation dose and image quality parameters were recorded while changing kV.Results Image quality (IQ) was decreased with increasing tube voltage.IQ reached best at tube voltage of 70 kV and 90 kV with IQFinv 6.27 and 6.10,while least at 110 kV with IQFinv 4.27.Value of pixels were decreased by 13％ when tube voltage was increased from 60 kV to 80 kV,but only changed by 2％ when tube voltage was increased from 80 kV to 130 kV.Pattern noise was increased with tube voltage.Compared with that of 60 kV,pattern noise was respectively increased by 9.6％ and 16.9％ at 90 kV and 120 kV.Significant positive correlation was observed between IQFinv and DAP(P＜0.05).Conclusion High image quality and effective control of radiation dose in examinees can obtain proper tube voltage and mAs in DR.[Chinese Medical Equipment Joumal,2013,34(5):108-110]关键词
数字化/X线摄影/曝光条件/影像质量Key words
digital/x-ray photography/exposure condition/image quality分类
医药卫生引用本文复制引用
赵洪波,曲良勇,张沉石,刘士远..DR摄片管电压与影像质量和辐射剂量的相关性研究[J].医疗卫生装备,2013,34(5):108-110,3.
