Katie Hulme, a diagnostic medical physicist at Cleveland Clinic, and colleagues first calibrated four consumer-grade displays with a fixed contrast ratio of 275 to the DICOM Standard Grey Scale Standard Display Function (GSDF) using a verified external photometer and setting the white point to 350 cd/m2. Once calibrated, researchers evaluated the displays for baseline uniformity, visual integrity, and GSDF conformance.
From there, the researchers measured the displays' conformance with the GSDF each week and corrected any failures with recalibration. They recorded deviations from the target white point and maximum absolute deviation from the GSDF and compared those to the quality control histories of six medical-grade displays, which had backlight hours ranging from 2,211 to 11,961.
They found that luminance deviation from the median for the consumer-grade displays ranged from 5.7% to 8.1%, compared with 2.7% to 5.9% for the medical-grade displays. They also found that consumer-grade displays have more backlight drift than medical-grade displays. For consumer-grade displays, the average deviation from the target white points was 3.15% (standard deviation, 1.59%) over less than 30 days compared with -0.001% (standard deviation, 0.15%) for medical-grade displays.
What else did they find? Stop by this Monday morning talk to learn more.
