15 April 1996 Monitor simulations for the optimization of medical soft copies
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Abstract
We investigate a simulation tool for the optimization of soft copy displays in radiology. The digital image is traced through the individual components of a black and white cathode ray tube (CRT) monitor and the luminance image observed at the glass faceplate is simulated. The simulated images can be evaluated numerically or rendered on film by a high-resolution printer for viewing. We validated the program simulating a real existing monitor by comparing the results with measured values, as well as by visually comparing the actual image with the simulated one. The gross properties like luminance, dynamic range, and spatial resolution are sufficiently well described. The visual impression of the simulated image is very similar to that of the real soft copy. We investigate the influence of individual parameters on image quality. We find that the bandwidth of the video amplifier has to be larger than half the pixel rate. We demonstrate the influence of the electron beam spot size on spatial resolution. It is shown how the spatial resolution depends on phosphor luminous efficiency and on glass transmission. Furthermore, for a given target display curve, it is found that the current-to- voltage relationship of the electron gun influences the number of perceived gray values. Finally we discuss phosphor noise in context with dynamic range.
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Thomas Mertelmeier, Thomas E. Kocher, "Monitor simulations for the optimization of medical soft copies", Proc. SPIE 2707, Medical Imaging 1996: Image Display, (15 April 1996); doi: 10.1117/12.238460; https://doi.org/10.1117/12.238460
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