Premium
A comparison of the performance of digital mammography systems
Author(s) -
Monnin P.,
Gutierrez D.,
Bulling S.,
Guntern D.,
Verdun F. R.
Publication year - 2007
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 - 10.1118/1.2432072
Subject(s) - detective quantum efficiency , optical transfer function , mammography , optics , digital mammography , image quality , spatial frequency , digital radiography , image resolution , computed radiography , noise (video) , physics , computer science , radiography , medicine , computer vision , cancer , breast cancer , image (mathematics) , nuclear physics
An objective analysis of image quality parameters was performed for six digital mammography systems. The presampled modulation transfer function (MTF), normalized noise power spectrum (NNPS), and detective quantum efficiency (DQE) for the systems were determined at different doses, for 28 kVp with a Mo ∕ Mo or W ∕ Al target/filter combination and 2 mm of additional aluminium filtration. The flat‐panel units have higher MTF and DQE in the mid to high frequency range than standard CR systems. The highest DQE, over the whole dose range, is for the slit‐scanning direct photon counting system. Dual‐side read CR can overcome the inherent x‐ray absorption and signal collection limitations of standard CR mammography, improving the low‐frequency DQE by 40%, to the same level as full‐field systems, but it does not improve the poor spatial resolution of phosphor.