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Proceedings Paper

Acceptance testing for softcopy displays
Author(s): Thomas Mertelmeier; Peter Scharl
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Paper Abstract

We report on the German standardization activities for acceptance testing of medical soft copy displays. The goal is to assure image quality of imaging systems in radiology considering that the display device is part of the imaging system consisting furthermore of the image acquisition system, of the human visual systems (HVS), and of the ambient light conditions. We analyze the properties of the HVS with respect to soft copy reading. The contrast sensitivity gives a measure for the display's spatial resolution that should be aimed at. The contrast ratio of maximum to minimum luminance is limited by the adaptation process in realistic complex radiological images. Furthermore, the nonlinear behavior of the HVS requires to establish a certain display function to provide a tone scale that is approximately perceptually linear. These HVS properties have to be compared with typical electronic display parameters and with conventional film/screen images under realistic conditions. As a result we end up with recommendations for the display size, for spatial resolution, for luminance, and for contrast ratio to be fulfilled by display systems. These parameters among others are subject to acceptance testing. We describe the classification of displays into application categories, the test equipment, and the test procedures that can and shall be applied in clinical practice. In particular, we analyze the luminance measurement proposed by the acceptance testing standard.

Paper Details

Date Published: 28 May 2001
PDF: 11 pages
Proc. SPIE 4319, Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures, (28 May 2001); doi: 10.1117/12.428096
Show Author Affiliations
Thomas Mertelmeier, Siemens AG (Germany)
Peter Scharl, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 4319:
Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures
Seong Ki Mun, Editor(s)

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