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Proceedings Paper

Resolution requirements for monitor viewing of digital flat-panel detector radiographs: a contrast detail analysis
Author(s): Siegfried Peer; Iris Steingruber; Eva Gassner; Regina Peer; Salvatore M. Giacomuzzi
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Paper Abstract

Since the introduction of digital flat panel detectors into clinical routine the discussion on monitor specifications for primary soft copy reading has gained new impetus. Major concerns exist for viewing of tiny opacities such as pulmonary nodules. In this study CDRAD phantom images were acquired on a caesium iodid/amorphous silicon detector at varying exposure levels. Images were read three times by three observers on a clinical 1K and 2K monitor workstation. All typical workstation functions such as magnification and window/level setting were applied during image reading. Correct detection ratios were calculated according to the CDRAD evaluation manual. Observer ratings were highest for high dose exposure and 2K monitor reading. No significant difference was detected in the correct detection ratio of observers. However, the difference between the two types of workstations (1K versus 2K monitors) despite less than 3% was significant at a 95% confidence level. This is in good accordance with recently published clinical studies. However, further clinical work will be needed to strengthen this laboratory based impression. Given these subtle differences in low contrast detail detection on 1K and 2K clinical PACS workstation we should probably rethink the recommendations of various national boards for the use of 2K monitors.

Paper Details

Date Published: 17 May 2002
PDF: 8 pages
Proc. SPIE 4681, Medical Imaging 2002: Visualization, Image-Guided Procedures, and Display, (17 May 2002); doi: 10.1117/12.466971
Show Author Affiliations
Siegfried Peer, Univ. Hospital Innsbruck (Austria)
Iris Steingruber, Univ. Hospital Innsbruck (Austria)
Eva Gassner, Univ. Hospital Innsbruck (Austria)
Regina Peer, Univ. Hospital Innsbruck (Austria)
Salvatore M. Giacomuzzi, Univ. Hospital Innsbruck (Austria)

Published in SPIE Proceedings Vol. 4681:
Medical Imaging 2002: Visualization, Image-Guided Procedures, and Display
Seong Ki Mun, Editor(s)

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