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Proceedings Paper

Using channelized Hotelling observers to quantify temporal effects of medical liquid crystal displays on detection performance
Author(s): Ljiljana Platiša; Bart Goossens; Ewout Vansteenkiste; Aldo Badano; Wilfried Philips
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Paper Abstract

Clinical practice is rapidly moving in the direction of volumetric imaging. Often, radiologists interpret these images in liquid crystal displays at browsing rates of 30 frames per second or higher. However, recent studies suggest that the slow response of the display can compromise image quality. In order to quantify the temporal effect of medical displays on detection performance, we investigate two designs of a multi-slice channelized Hotelling observer (msCHO) model in the task of detecting a single-slice signal in multi-slice simulated images. The design of msCHO models is inspired by simplifying assumptions about how humans observe while viewing in the stack-browsing mode. For comparison, we consider a standard CHO applied only on the slice where the signal is located, recently used in a similar study. We refer to it as a single-slice CHO (ssCHO). Overall, our results confirm previous findings that the slow response of displays degrades the detection performance of the observers. More specifically, the observed performance range of msCHO designs is higher compared to the ssCHO suggesting that the extent and rate of degradation, though significant, may be less drastic than previously estimated by the ssCHO. Especially, the difference between msCHO and ssCHO is more significant for higher browsing speeds than for slow image sequences or static images. This, together with their design criteria driven by the assumptions about humans, makes the msCHO models promising candidates for further studies aimed at building anthropomorphic observer models for the stack-mode image presentation.

Paper Details

Date Published: 27 February 2010
PDF: 11 pages
Proc. SPIE 7627, Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment, 76270U (27 February 2010); doi: 10.1117/12.844176
Show Author Affiliations
Ljiljana Platiša, Ghent Univ. (Belgium)
Bart Goossens, Ghent Univ. (Belgium)
Ewout Vansteenkiste, Ghent Univ. (Belgium)
Aldo Badano, U.S. Food and Drug Administration (United States)
Wilfried Philips, Ghent Univ. (Belgium)


Published in SPIE Proceedings Vol. 7627:
Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment
David J. Manning; Craig K. Abbey, Editor(s)

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