Effect of Monitor Luminance and Ambient Light on Observer Performance in Soft-Copy Reading of Digital Chest Radiographs

Goo, Jin Mo; Choi, Ja-Young; Im, Jung-Gi; Lee, Hyun Ju; Chung, Myung Jin; Han, Daehee; Park, Seong Ho; Kim, Jong Hyo; Nam, Sang-Hee

doi:10.1148/radiol.2323030628

Cited by 64 publications

(44 citation statements)

References 13 publications

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“…Liquid crystal displays (LCDs) are the current electronic display technology for viewing medical digital images. Calibration of the luminance response of each LCD is required to ensure that observer perception of an image is consistent on all displays as the inherent luminance properties of different LCDs can vary considerably (Goo et al, 2004;Fetterly et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Poor agreement between operators on grading of the placenta

Moran¹,

Ryan²,

Higgins

et al. 2011

Journal of Obstetrics and Gynaecology

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Section: Methodsmentioning

confidence: 99%

Poor agreement between operators on grading of the placenta

Moran¹,

Ryan²,

Higgins

et al. 2011

Journal of Obstetrics and Gynaecology

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“…Conventionally, it has been thought that ambient lighting should be minimized in reading rooms to maintain perceived image contrast [1,2]. The validity of this convention is supported by studies utilizing film and cathode ray tube (CRT) displays which demonstrated a generally negative effect of increased ambient lighting on chest radiologist performance [3,4].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Ambient Lighting in Chest Radiology Reading Rooms

et al. 2012

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Under typical dark chest radiography reading room conditions, a radiologist's pupils contract and dilate as their visual focus intermittently shifts between the high luminance monitor and the darker background wall, resulting in increased visual fatigue and degradation of diagnostic performance. A controlled increase of ambient lighting may minimize these visual adjustments and potentially improve comfort and accuracy. This study was designed to determine the effect of a controlled increase of ambient lighting on chest radiologist nodule detection performance. Four chest radiologists read 100 radiographs (50 normal and 50 containing a subtle nodule) under low (E01 lx) and elevated (E050 lx) ambient lighting levels on a DICOM-calibrated, medicalgrade liquid crystal display. Radiologists were asked to identify nodule locations and rate their detection confidence. A receiver operating characteristic (ROC) analysis of radiologist results was performed and area under ROC curve (AUC) values calculated for each ambient lighting level. Additionally, radiologist selection times under both illuminance conditions were determined. Average AUC values did not significantly differ (p>0.05) between ambient lighting levels (estimated mean difference0−0.03; 95% CI, (−0.08, 0.03)). Average selection times decreased or remained constant with increased illuminance. The most considerable decreases occurred for false positive identification times (35.4±18.8 to 26.2±14.9 s) and true positive identification times (29.7± 18.3 to 24.5±15.5 s). No performance differences were statistically significant. Study findings suggest that a controlled increase of ambient lighting within darkly lit chest radiology reading rooms, to a level more suitable for performance of common radiological tasks, does not appear to have a statistically significant effect on nodule detection performance.

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“…Many factors contribute to image quality in softcopy radiographic and mammographic display [39][40][41][42]. Although the FDA recommends that monitors used for interpretation be specifically cleared for FFDM use by the FDA, the use of others is also legal under MQSA [36].…”

Section: B Softcopy Display Devicesmentioning

confidence: 99%