Detectability of a lung nodule displayed on a liquid-crystal display monitor with different maximum luminance settings

Abstract

Our purpose in this study was to examine the detectability of a lung nodule at different maximum luminance settings of a liquid-crystal display (LCD) monitor by utilizing receiver operating characteristic (ROC) analysis. The LCD monitor used in this study was calibrated to the grayscale standard display function with different maximum luminance settings (670, 450, and 170 cd/m(2)). The average area under the ROC curve (AUC) and the standard deviation for all observers at 670, 450, and 170 cd/m(2) were 0.837 +/- 0.076, 0.832 +/- 0.051, and 0.830 +/- 0.078, respectively. There was no statistically significant difference in AUC as a function of the maximum luminance setting of the LCD monitor. Considering the results, setting the maximum luminance of an LCD monitor at a higher level may not provide a significant advantage in the detectability of a lung nodule.

Comparison of detectability of a simple object with low contrast displayed on a high-brightness color LCD and a monochrome LCD

“…According to our previous study, the luminance of this signal was similar to that of the lung nodule located between the ribs [16].…”

“…We also found that the detectability of the simple object with low contrast for the 170 cd/m 2 color LCD was comparable to that of the One interesting question in soft-copy reading is how the luminance of the medical-grade LCD affects the diagnostic accuracy. In our previous study, the detectability of lung nodules as well as of a simple object with low contrast on a medical-grade monochrome LCD for different maximum luminance settings was examined by ROC analysis [16]. Our results indicated that there were no statistically significant differences in the average AUC as a function of the maximum luminance settings of the LCD.…”