Proceedings Paper
Influence of monitor characteristics on the signals detection present in the mammographic phantom image| Format | Member Price | Non-Member Price |
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Paper Abstract
The objective of this study was to compare the detection of microcalcifications and fibers on phantom images based on
monitor readings versus analog image readings. 180 films were obtained with 3 different mammographic equipment
under different exposure conditions and digitized using the Lumiscan75 scanner. It was used the ALVIM statistical
phantom (4,5cm) and 2 acrylic plates of 1cm (6,5cm) over it. The software named QualIM was developed to manager the
images and the database which storages the specialist's readings allowing them digital tools manipulation. The images
were displayed on 4 monitors: CRT Philips 19" (2,9Mpixels/8bits), CRT Philips 22" (3,0Mpixels/8bits), LCD Clinton
(3,0Mpixels/10bits) and LCD Barco (5,0Mpixels/14bits). The same images group was also displayed on the appropriated
view box to mammograms (3200cd/m2) and the readings performance was taken as reference parameter. The software
generates on real time Kappa values to microcalcifications and fibers detection, histogram, ROC curve and true/false
positive parameters. Barco monitor readings produced superior results when compared with all the others suggesting that
there weren't losses in the digitalizing process. Clinton monitor readings were similar the view box results and superior
on both Philips monitors when compared the detection of objects on phantom images (6,5cm). The specialist
performance results using Philips 22" were only comparable to view box and Clinton for images of 4,5cm. It was
possible to verify that the monitors' spatial and contrast resolutions have influenced on the readings performance of
specialists, suggesting these characteristics are relevant at lesions detection performance in mammographic exams.
Paper Details
Date Published: 6 March 2008
PDF: 10 pages
Proc. SPIE 6917, Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, 69171H (6 March 2008); doi: 10.1117/12.770814
Published in SPIE Proceedings Vol. 6917:
Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment
Berkman Sahiner; David J. Manning, Editor(s)
PDF: 10 pages
Proc. SPIE 6917, Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, 69171H (6 March 2008); doi: 10.1117/12.770814
Show Author Affiliations
Silvio Ricardo Pires, Univ. Federal de São Paulo (Brazil)
Regina Bitelli Medeiros, Univ. Federal de São Paulo (Brazil)
Published in SPIE Proceedings Vol. 6917:
Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment
Berkman Sahiner; David J. Manning, Editor(s)
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