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Influence of 8‐bit vs. 11‐bit digital displays on observer performance and visual search: A multi‐center evaluation
Author(s) -
Krupinski Elizabeth A.,
Siddiqui Khan,
Siegel Eliot,
Shrestha Rasu,
Grant Edward,
Roehrig Hans,
Fan Jiahua
Publication year - 2007
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2749324
Subject(s) - computer science , bit (key) , monochrome , significant difference , window (computing) , artificial intelligence , computer vision , mathematics , statistics , computer security , operating system
— Medical‐grade monochrome monitors typically display 8 bits of data. This study determined if 11‐bit displays could improve observer performance and decrease use of window/level. 8‐ and 11‐bit displays from three manufacturers were used at three sites. Six radiologists at each site viewed 100 DR chest images (half with a pulmonary nodule) on both displays. Decisions, confidence, nodule location, viewing time, and window/level use were recorded. There was no significant difference in ROC Az as a function of bit depth. The average Az with 8 bits was 0.8284 and with 11 bits was 0.8253. There was a significant difference in viewing time favoring the 11‐bit displays. Window/level use did not differ. Eye position was recorded on a subset of images at one site. Cumulative dwell times for each decision category were lower with the 11‐bit than with the 8‐bit display. When tested with t ‐tests for paired observations, the TP ( t = 1.452, p = 0.1507), FN ( t = 0.050, p = 0.9609), and FP ( t = 0.042, p = 0.9676) were not statistically significant. The difference in the TN decisions was statistically significant ( t = 1.926, p = 0.05). 8‐bit displays will not impact negatively diagnostic accuracy, but using 11‐bit displays may improve workflow efficiency.