Using a NPWE model observer to assess suitable image quality for a digital mammography quality assurance programme.

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Serval ID
serval:BIB_1789ACAE83EE
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Using a NPWE model observer to assess suitable image quality for a digital mammography quality assurance programme.
Journal
Radiation Protection Dosimetry
Author(s)
Monnin P., Bochud F.O., Verdun F.R.
ISSN
1742-3406[electronic], 0144-8420[linking]
Publication state
Published
Issued date
2010
Volume
139
Number
1-3
Pages
459-462
Language
english
Abstract
A method of objectively determining imaging performance for a mammography quality assurance programme for digital systems was developed. The method is based on the assessment of the visibility of a spherical microcalcification of 0.2 mm using a quasi-ideal observer model. It requires the assessment of the spatial resolution (modulation transfer function) and the noise power spectra of the systems. The contrast is measured using a 0.2-mm thick Al sheet and Polymethylmethacrylate (PMMA) blocks. The minimal image quality was defined as that giving a target contrast-to-noise ratio (CNR) of 5.4. Several evaluations of this objective method for evaluating image quality in mammography quality assurance programmes have been considered on computed radiography (CR) and digital radiography (DR) mammography systems. The measurement gives a threshold CNR necessary to reach the minimum standard image quality required with regards to the visibility of a 0.2-mm microcalcification. This method may replace the CDMAM image evaluation and simplify the threshold contrast visibility test used in mammography quality.
Keywords
Performance
Pubmed
Web of science
Open Access
Yes
Create date
08/06/2010 14:34
Last modification date
01/10/2019 6:17
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