中国医学装备2017，Vol.14Issue(4)：32-35,4.DOI:10.3969/J.ISSN.1672-8270.2017.04.007
基于噪声功率谱的不同重建类型CT图像噪声分析
The noise analysis of CT imaging based on noise power spectrum of different reconstruction type
原媛 1卢东生 2钟朝辉1
作者信息
- 1. 首都医科大学附属北京友谊医院放射科 北京 100050
- 2. 首都医科大学附属北京友谊医院医工部 北京 100050
- 折叠
摘要
Abstract
Objective: To evaluate the noise characteristic of different reconstruction type CT image by using the noise power spectrum (NPS), and analyze the correlation between this results and subjective vision noise evaluation. Methods: QA water phantom of CT equipment was scanned and 8 common reconstruction algorithms were applied to dispose image. NPS peak value, the peak frequency and standard deviation (SD) were compared with the subjective evaluation measurements, such as granularity, contrast, sharpness and optical noise level, by using the correlation analysis. Results: Each reconstruction algorithm owned different peak value and peak frequency. Granularity negatively correlated with the peak frequency. A positive correlation was found between contrast and peak value. Sharpness was positively correlated with both peak value and peak frequency. All of the subjective evaluation measurements were correlated with SD. Conclusion: Comparing with SD, NPS can reflect both intensity and morphological feature of the noise and possess applicative potential as a more comprehensive evaluation index.关键词
噪声功率谱/噪声/主观评价/客观评价/CT/图像重建/图像质量Key words
Noise power spectrum/Noise/Subjective evaluation/Objective evaluation/CT/Image reconstruction/Image quality分类
医药卫生引用本文复制引用
原媛,卢东生,钟朝辉..基于噪声功率谱的不同重建类型CT图像噪声分析[J].中国医学装备,2017,14(4):32-35,4.
