Computations of the Signal-to-Noise Ratio for Medical X-Ray Imagers

Yu Chen Lo, Kuan Chieh Huang, Kei-Hsiung Yang

Research output: Contribution to journalArticle

Abstract

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.
Original languageEnglish
JournalChinese Journal of Physics
Volume52
Issue number4
DOIs
StatePublished - Aug 2014

Keywords

  • AMORPHOUS SELENIUM; DETECTORS; DISPLAY

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