中国医学装备Issue(5)：34-36,37,4.DOI:10.3969/J.ISSN.1672-8270.2014.05.013
基于调制传递函数对CT图像空间分辨率质量评估的分析
Analysis on spatial resolution quality of CT image based on the modulation transfer function
江选东 1方黎 1刘伟 2文星3
作者信息
- 1. 解放军第169中心医院医学工程科 湖南 衡阳 421002
- 2. 解放军第169中心医院医务处 湖南 衡阳 421002
- 3. 解放军第169中心医院放射科 湖南 衡阳 421002
- 折叠
摘要
Abstract
Objective:To analyze spatial resolution quality of CT image which is an important parameter of quality detection based on the modulation transfer function. Methods:Tungsten ball with diameter of 0.28nm in Catphan500 CT Performance testing body model was used to simulate point source to establish point spread function of image. Then modulation transfer function, which is commonly used for spatial resolution feature assessment of imaging system, was further used to assess spatial resolution of CT image. Results: By applying point spread function and modulation transfer function, assessment result was more accurate and more unique, and there was more information. Conclusion:application of point spread function and modulation transfer function can effectively improve accuracy and uniqueness of assessment result, which is worthy of wider application.关键词
调制传递函数/点扩散函数/体层摄影术,X线计算机/图像/空间分辨率Key words
Modulation transfer function/Point spread function/Tomography, X-ray computed/Images/Spatial resolution分类
医药卫生引用本文复制引用
江选东,方黎,刘伟,文星..基于调制传递函数对CT图像空间分辨率质量评估的分析[J].中国医学装备,2014,(5):34-36,37,4.
