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Proceedings Paper

Comparative visualization of digital mammograms on clinical 2K monitor workstations and hardcopy: a contrast detail analysis
Author(s): Pavle Torbica; Wolfgang Buchberger; M. Bernathova; Ammar Mallouhi; Siegfried Peer; Hilde Bosmans; Keith Faulkner
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Paper Abstract

The purpose of this study was to compare the radiologist`s performance in detecting small low-contrast objects with hardcopy and softcopy reading of digital mammograms. 12 images of a contrast-detail (CD) phantom without and with 25.4 mm, 50.8 mm, and 76.2 mm additional polymethylmetacrylate (PMMA) attenuation were acquired with a caesium iodid/amorphous silicon flat panel detector under standard exposure conditions. The phantom images were read by three independent observers, by conducting a four-alternative forced-choice experiment. Reading of the hardcopy was done on a mammography viewbox under standardized reading conditions. For soft copy reading, a dedicated workstation with two 2K monitors was used. CD-curves and image quality figure (IQF) values were calculated from the correct detection rates of randomly located gold disks in the phantom. The figures were compared for both reading conditions and for different PMMA layers. For all types of exposures, soft copy reading resulted in significantly better contrast-detail characteristics and IQF values, as compared to hard copy reading of laser printouts. (p< 0.01). The authors conclude that the threshold contrast characteristics of digital mammograms displayed on high-resolution monitors are sufficient to make soft copy reading of digital mammograms feasible.

Paper Details

Date Published: 30 May 2003
PDF: 9 pages
Proc. SPIE 5029, Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display, (30 May 2003); doi: 10.1117/12.479991
Show Author Affiliations
Pavle Torbica, Univ. Hospital Innsbruck (Austria)
Wolfgang Buchberger, Univ. Hospital Innsbruck (Austria)
M. Bernathova, Univ. Hospital Innsbruck (Austria)
Ammar Mallouhi, Univ. Hospital Innsbruck (Austria)
Siegfried Peer, Univ. Hospital Innsbruck (Austria)
Hilde Bosmans, Univ. Ziekenhuizen Leuven (Belgium)
Keith Faulkner, Newcastle General Hospital (United Kingdom)

Published in SPIE Proceedings Vol. 5029:
Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display
Robert L. Galloway Jr., Editor(s)

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