Effect of ambient light level at the monitor surface on digital radiographic evaluation of approximal carious lesions: anin vitrostudy

The influence of ambient lighting on the detection of small contrast elements in digital dental radiographs

“…This seems to be in contrast to studies which showed that values above 450 lx reduce perception of micronodules and pulmonary lines in chest image on cathode ray tubes [10,11]. A recent study could show that the detection of caries lesions at a background illumination of 1,000 lx is significantly inferior to the detection at 50 lx background illumination on a LCD monitor [12]. It is difficult to compare the results since it is unknown to what extend the different types of monitors, e.g., TFT, LCD or CRT, as used in our study may be influenced by the ambient background illumination with regard to the resulting diagnostic performance.…”

Carious lesions: diagnostic accuracy using pre-calibrated monitor in various ambient light levels: anin vitrostudy

“…Both dim lighting (less than 50 lux) in 20 found that a calibrated monitor in a room with dimmed ambient light of less than 50 lux resulted in significantly higher diagnostic accuracy for carious lesions into the dentine than a calibrated monitor with a metallic hood for separating the incoming light from the surface in a room with bright ambient light of more than 1000 lux. The correlating numbers in the present study were slightly higher but the actual figures cannot be compared since the observers were not the same.…”

Evaluation of low-contrast perceptibility in dental restorative materials under the influence of ambient light conditions

“…In this study, an object used standardized details to construct a perceptibility curve, a test that assesses the observers' performance to visual stimuli, regardless of their level of knowledge, thus they only reported on what they saw. 22 Conversely, in studies [8][9][10][11][12][13] that seek to evaluate the observer's performance for a specific diagnosis in a condition for a given combination of factors, the level of knowledge of the observer 13 can be considered as a bias because an observer's lack of knowledge can invalidate the results. Regarding a second matter that relates to the ambient-light level, only the study by Schriewer et al 11 has evaluated the influence of ambient-light levels on the observer's performance for detecting standardized details; however, these researchers' results differed from the present study in that ambient light was not a factor of influence for their perception.…”

“…Compare this with a standard computer monitor, which shows images with 256 shades of grey. 7 However, there is controversy regarding changes in observational conditions of digital radiography related to ambient-light levels [8][9][10][11][12][13] if the light interferes with any diagnostic performance owing to non-linearity of the photoreceptors responding to incremental stimuli related to a gain in overall luminance levels. 14 Thus, the aim of this study was to assess the perception of details in dental restorative composites of different radio-opacities under the influence of ambient light.…”