Aims and objectives Monochrome liquid crystal (LCD) display monitors are commonly utilised in diagnostic radiology for medical image viewing. The reason behind this is they have a high luminance compared with the colour liquid crystal display (LCD) monitors [1]. However monochrome LCD monitors are extremely expensive compared with colour LCD monitors; consequently, some institutions use the standard colour liquid crystal display (LCD) monitors even though they have lower luminance [2]. A high luminance is required for monitors utilised in diagnostic radiology [3] because it is important for visualising the entire grayscale, from black to white, of the medical image [2]. According to the American College of Radiology the luminance of a display monitor to be used for primary interpretation of the medical images must be at least 171 cd/m 2 [4]. View article