標題: Computations of the Signal-to-Noise Ratio for Medical X-Ray Imagers
作者: Lo, Yu-Chen
Huang, Kuan-Chieh
Yang, Kei-Hsiung
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
公開日期: 1-Aug-2014
摘要: If the signal in a medical X-ray imaging detector is formed by integrating the scintillation (or electrical) pulses, rather than by counting them, the signal-to-noise ratio is reduced by a factor which depends on the pulse height distribution. Formulas are expanded from Swank\'s publication to derive the signal-to-noise ratio for any given optical or electrical pulse-size distribution. A new quantity called noise-equivalent absorption is defined which bears a simple relationship to the signal-to-noise ratio of integrated X-ray imaging as the quantum absorption to the signal-to-noise ratio of photon-counting X-ray imaging.
URI: http://dx.doi.org/10.6122/CJP.52.1277
http://hdl.handle.net/11536/123992
ISSN: 0577-9073
DOI: 10.6122/CJP.52.1277
期刊: CHINESE JOURNAL OF PHYSICS
Volume: 52
起始頁: 1277
結束頁: 1287
Appears in Collections:Articles