A fundamental method to determine the signal-to-noise ratio (SNR) and detective quantum efficiency (DQE) for a photon counting pixel detector
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- 作者：T. Michel ; G. Anton ; M. Bö ; hnel ; J. Durst ; M. Firsching ; A. Korn ; B. Kreisler ; A. Loehr ; F. Nachtrab ; D. Niederlö ; hner ; et al.
- 关键词：X-Ray imaging ; Photon counting detector ; Signal-to-noise ratio (SNR) ; Detective quantum efficiency (DQE) ; Multiplicity of counts ; Medipix ; Pixel detector
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2006
- 出版时间：1 December 2006
- 年：2006
- 卷：568
- 期：2
- 页码：799-802
- 全文大小：137 K
文摘
We outline in this paper that the noise of a photon counting pixel detector depends on the detection efficiency and the average multiplicity of counts per interacting photon. We give a simple expression for the signal-to-noise ratio (SNR) and zero-frequency detective quantum efficiency (DQE). We describe a method to determine the DQE from measured data and to optimize the DQE as a function of energy threshold.