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. 2004 Dec;17(4):258-63.
doi: 10.1007/s10278-004-1016-4.

Use of a human visual system model to predict observer performance with CRT vs LCD display of images

Elizabeth A Krupinski  1 , Jeffrey Johnson, Hans Roehrig, John Nafziger, Jiahua Fan, Jeffery Lubin
Affiliations

Use of a human visual system model to predict observer performance with CRT vs LCD display of images

Elizabeth A Krupinski et al. J Digit Imaging. 2004 Dec.

Abstract

This Project evaluated a human visual system model (JNDmetrix) based on just noticeable difference (JND) and frequency-channel vision-modeling principles to assess whether a Cathode ray tube (CRT) or a liquid crystal display (LCD) monochrome display monitor would yield better observer performance in radiographic interpretation. Key physical characteristics, such as veiling glare and modulation transfer function (MTF) of the CRT and LCD were measured. Regions of interest from mammographic images with masses of different contrast levels were shown once on each display to six radiologists using a counterbalanced presentation order. The images were analyzed using the JNDmetrix model. Performance as measured by receiver operating characteristic (ROC) analysis was significantly better overall on the LCD display (P = 0.0120). The JNDmetrix model predicted the result (P = 0.0046) and correlation between human and computer observers was high (r (2) (quadratic) = 0.997). The results suggest that observer performance with LCD displays is superior to CRT viewing, at least for on-axis viewing.

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Figures

Figure 1
Figure 1
MTF in the vertical and horizontal directions for the cathode ray tube (CRT) and liquid crystal display (LCD) monitors.
Figure 2
Figure 2
Veiling glare measurements for the CRT and LCD monitors.
Figure 3
Figure 3
Mean receiver operating characteristic (ROC) Az values for each lesion contrast level for CRT and LCD viewing.
Figure 4
Figure 4
Mean model just noticeable difference (JND) values for each lesion contrast level for CRT and LCD viewing.
Figure 5
Figure 5
Correlation between human and model observers for each lesion contrast level for CRT and LCD viewing.
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