title: Comparison of detectability of a simple object with low contrast displayed on a high-brightness color LCD and a monochrome LCD.
abstract: The goal of this study was to investigate the effect of the different luminance settings of a high-brightness color liquid-crystal display (LCD) on the detectability of a simple grayscale object with low contrast by use of receiver operating characteristic (ROC) analysis. The detectability of a high-brightness color LCD with two maximum-luminance settings (500 and 170 cd/m(2)) was compared with the detectability of a monochrome LCD (500 cd/m(2)). The two LCDs used in this study were calibrated to the grayscale standard display function. The average areas under the ROC curve (AUCs) and the standard deviations for all thirteen observers for the 500 cd/m(2) color LCD, 500 cd/m(2) monochrome LCD, and 170 cd/m(2) color LCD were 0.937 +/- 0.040, 0.924 +/- 0.056, and 0.915 +/- 0.068, respectively. There were no statistically significant differences in the average AUCs among the three LCD monitor conditions. On the other hand, the total observation time for the 170 cd/m(2) color LCD was significantly shorter than that for the 500 cd/m(2) color and monochrome LCDs (p < 0.05). Irrespective of the maximum luminance settings (500 and 170 cd/m(2)), the color LCD provided a performance comparable to the monochrome LCD for detection of a simple grayscale object with low contrast.
authors.affiliation: Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. keita.takahashi.desu@gmail.com
authors.forename: Keita
authors.initials: K
authors.lastname: Takahashi
authors.forename: Junji
authors.initials: J
authors.lastname: Morishita
authors.forename: Takeshi
authors.initials: T
authors.lastname: Hiwasa
authors.forename: Shiro
authors.initials: S
authors.lastname: Hatanaka
authors.forename: Shuji
authors.initials: S
authors.lastname: Sakai
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hashimoto
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Fukai
authors.initials: F
authors.lastname: Toyofuku
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Higashida
authors.forename: Masafumi
authors.initials: M
authors.lastname: Ohki
mesh_terms: D019540:Area Under Curve; D003116:Color; D055615:Electrical Equipment and Supplies; D008027:Light; D050866:Liquid Crystals; D012372:ROC Curve; D011871:Radiology
references.citation: Radiol Phys Technol. 2010 Jan;3(1):10-5
references.pmid: 20821096
references.citation: Acad Radiol. 2007 Jul;14(7):814-29
references.pmid: 17574132
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2004 Oct;60(10):1361-8
references.pmid: 15565002
references.citation: Radiology. 2000 Apr;215(1):169-74
references.pmid: 10751483
references.citation: Radiol Phys Technol. 2008 Jan;1(1):95-9
references.pmid: 20821169
references.citation: Invest Radiol. 1992 Sep;27(9):723-31
references.pmid: 1399456
references.citation: J Digit Imaging. 1997 Nov;10(4):174-82
references.pmid: 9399171
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2002 Oct;58(10):1297-302
references.pmid: 12540753
references.citation: Acad Radiol. 2007 May;14(5):539-46
references.pmid: 17434067
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2005 Aug 20;61(8):1151-7
references.pmid: 16132034
references.citation: Radiology. 2004 Sep;232(3):762-6
references.pmid: 15273338
references.citation: Med Phys. 2007 Jan;34(1):81-90
references.pmid: 17278493
references.citation: J Math Psychol. 1999 Mar;43(1):1-33
references.pmid: 10069933
references.citation: Comput Med Imaging Graph. 2002 May-Jun;26(3):181-5
references.pmid: 11918981
references.citation: Acad Radiol. 2007 Jun;14(6):723-48
references.pmid: 17502262
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2006 May 20;62(5):734-41
references.pmid: 16733502
references.citation: Med Phys. 2008 Jun;35(6):2204-13
references.pmid: 18649449
references.citation: N Engl J Med. 1997 Oct 16;337(16):1159-61
references.pmid: 9329939