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Noise characteristics of a microchannel plate x‐ray image intensifier
Author(s) -
Gould Robert G.,
Judy Philip F.,
Bjärngard Bengt E.
Publication year - 1978
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 - 10.1118/1.594470
Subject(s) - image intensifier , noise (video) , optics , microchannel plate detector , medical imaging , computed radiography , image processing , image noise , medical physics , physics , image quality , image (mathematics) , acoustics , computer science , computer vision , artificial intelligence , detector
The noise performance of an experimental microchannel plate x‐ray image intensifier has been evaluated. The intensifier, constructed for use with photons of energies between 20 and 150 keV, uses an MCP as the photon‐to‐electron converter. The influence of noise was determined by analysis of the optical‐density fluctuations of a photograph of the viewing screen of the intensifier when the conversion layer was exposed to between 1 and 60 mR. Additionally, the contrast‐detail performance of the experimental device was determined. The influence of both stochastic noise, due to quantum mottle and pulse‐height variations, and structural noise, due to fluctuations in inherent gain from point to point, have been considered by using a model that adds these components.