Effect of ambient light and monitor brightness and contrast settings on the detection of approximal caries in digital radiographs: anin vitrostudy

Abstract

Reducing ambient light to less than 50 lux significantly increased the accuracy of diagnosing approximal carious lesions on a monitor with an optimal brightness setting and an optimal or slightly higher than optimal contrast setting.

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

“…This type of monitor is commonly used in dental practices. Before evaluation, monitor brightness and contrast 8 were adjusted visually using AAPM test images task group 18 (TG18)-QC and TG18-CT. 11 AAPM test images TG18-LN12-01, -09, and -18 11 were used to ensure that monitor luminance was unchanged for all evaluations. 3 sets of lighting conditions with varying illuminance at the monitor surface were evaluated: (a) ambient room light at 1000 lx (range, 1012-1057 lx); (b) 50 lx (range, 42-50 lx)-no hood was used on the monitor; and (c) bright light in the room and a hood mounted on the monitor.…”

“…Many studies in recent years 3,8,9 have concluded that it is essential to optimize observation conditions for reading digital radiographs on a display monitor. Ambient light level in the room is a vital factor for optimizing diagnostic accuracy.…”

“…According to the results of the Hellén-Halme et al 20 study, 5 years' experience ensured increased diagnostic accuracy for carious lesions in digital radiographs. A previous study 8 showed that it is essential to use an adjusted monitor when evaluating radiographic images for carious lesions. Therefore, AAPM test images 11 were used to calibrate the study monitor for brightness and contrast.…”

“…3,[8][9][10] According to the American Association of Physicists in Medicine (AAPM), 11 ambient light should be , 50 lx 11 (very dim) when evaluating digital radiographs on a standard monitor. By contrast, operating room lighting in a general dental practice is normally very bright (.…”

The Influence of Tube Potential on Periodontal Bone Level Measurements and Subjective Image Quality Using a Digital Photostimulable Storage Phosphor Sensor

“…However, the outcome of this radiographic evaluation is not only depending on exposure parameters but also on image sensor type and viewing conditions [4][5][6][7][8][9][10][11][12][13][14]. Accuracy of alveolar bone level measurements on conventional or digital radiographs has been found to lie within 1 to 2 mm deviation [15][16][17], the latter resulting in similar [17][18][19] or greater accuracy [20][21][22].…”