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Quantum noise in detectors
Author(s) -
Rimkus Daniel,
Baily Norman A.
Publication year - 1983
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595393
Subject(s) - photon , detector , physics , optics , noise (video) , x ray detector , absorbed dose , particle detector , computational physics , radiation , artificial intelligence , computer science , image (mathematics)
The variance in the number of x‐ray photons absorbed by a detector is derived from theoretical considerations. The distributions in the number of x‐ray photons produced by the x‐ray tube, transmitted through the patient, and absorbed by the detector are described. These distributions are compounded to yield a distribution in the number of x‐ray photons absorbed by a detector. The standard deviation (quantum noise) in this distribution is very well approximated by the commonly used and experimentally verified quantity √ N ̄ where N ̄ is the average number of x‐ray photons absorbed by the detector.