Viewing images on and off axis with CRT and LCD monitors: effects on observer and model performance

Elizabeth A. Krupinski; Jeffrey P. Johnson; Hans Roehrig; John S. Nafziger; Jeffrey Lubin

doi:10.1117/12.592216

6 April 2005 Viewing images on and off axis with CRT and LCD monitors: effects on observer and model performance

Elizabeth A. Krupinski, Jeffrey P. Johnson, Hans Roehrig, John S. Nafziger, Jeffrey Lubin

Proceedings Volume 5749, Medical Imaging 2005: Image Perception, Observer Performance, and Technology Assessment; (2005) https://doi.org/10.1117/12.592216
Event: Medical Imaging, 2005, San Diego, California, United States

Abstract

CRT displays are generally used for softcopy display in the digital reading room, but LCDs are being used more frequently. LCDs have many useful properties, but can suffer from significant degradation when viewed off-axis. We compared observer performance and human visual system model performance for on and off-axis CRT and LCD viewing. 400 mammographic regions of interest with different lesion contrasts were shown on and off-axis to radiologists on a CRT and LCD. Receiver Operating Characteristic (ROC) techniques were used to analyze observer performance and results were correlated with the predictions of the human vision model (JNDmetrix model). Both sets of performance metrics showed that LCD on-axis viewing was better than the CRT; and off-axis was significantly better with the CRT. Off-axis LCD viewing of radiographs can degrade observer performance compared to a CRT.

Citation Download Citation

Elizabeth A. Krupinski, Jeffrey P. Johnson, Hans Roehrig, John S. Nafziger, and Jeffrey Lubin "Viewing images on and off axis with CRT and LCD monitors: effects on observer and model performance", Proc. SPIE 5749, Medical Imaging 2005: Image Perception, Observer Performance, and Technology Assessment, (6 April 2005); https://doi.org/10.1117/12.592216

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KEYWORDS

LCDs

CRTs

Performance modeling

Visual process modeling

Signal detection

Visual system

Modulation transfer functions

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