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Influence of cassette type on the DQE of CR systems
Author(s) -
Monnin P.,
Holzer Z.,
Wolf R.,
Neitzel U.,
Vock P.,
Gudinchet F.,
Verdun F. R.
Publication year - 2006
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 - 10.1118/1.2336503
Subject(s) - detective quantum efficiency , optical transfer function , kerma , optics , computed radiography , spatial frequency , detector , physics , noise (video) , nuclear medicine , image quality , medicine , computer science , dosimetry , image (mathematics) , artificial intelligence
In our recent paper by Monnin et al. [Med. Phys., 411–420 (2006)], an objective analysis of the relative performance of a computed radiography (CR) system using both standard single‐side (ST‐VI) and prototype dual‐side read (ST‐BD) plates was reported. The presampled modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE) for the systems were determined at three different beam qualities representative of paediatric chest radiography, at an entrance detector air kerma of 5 μ Gy . Experiments demonstrated that, compared to the standard single‐side read system, the MTF for the dual‐side read system was slightly reduced, but a significant decrease in image noise resulted in a marked increase in DQE ( + 40 % ) in the low spatial frequency range. However, the DQE improvement for the ST‐BD plate decreased with increasing spatial frequency, and, at spatial frequencies above 2.2mm − 1, the DQE of the dual‐side read system was lower than that of the single‐side one.