Effective luminance deterioration of medical liquid crystal displays in clinical use

Keita Takahashi, Shinichi Awamoto, Shinya Takarabe, Kazuhisa Ogawa, Yasuhiko Nakamura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The objective of this work was to evaluate the maximum luminance (Lmax) level of medical liquid crystal displays (LCDs) as a function of backlight hours (BLH) annually. The Lmax values for 249 2-megapixel color LCDs (RadiForce RX210, EIZO Corporation) were measured in February 2014, 2015, and 2016. Four near-range luminance meters and the built-in type luminance meters, each with an LCD, were used for the measurements. The average and standard deviation (SD) of BLH measured in 2014 was 15,371 ± 8219 h. Four, twenty, and thirty-nine LCDs failed in the constancy tests performed in February 2014, 2015, and 2016, respectively, i.e., they were unable to output 170 cd/m2. The SD of Lmax increased each year and as BLH became longer. In conclusion, evaluation of Lmax as a function of BLH during constancy testing will help predict the decrease in Lmax of a clinically used medical color LCD.

Original languageEnglish
Pages (from-to)382-386
Number of pages5
JournalRadiological physics and technology
Issue number3
Publication statusPublished - Sept 1 2017

All Science Journal Classification (ASJC) codes

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging


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