What device is required for quality assurance testing of monitor luminance?

• A. Calibrator
• B. Photo meter
• C. Light meter
• D. Digital ruler

Answer: (B)

The photo meter is the correct device used for quality assurance testing of monitor luminance. A photo meter measures the light output from a monitor, which is essential for evaluating the brightness and contrast of the display. This testing is crucial in ensuring that medical images are presented with the appropriate luminance levels, which directly impacts the interpretation and diagnosis made by radiologists. Consistent luminance levels are vital for maintaining image quality and ensuring accurate readings.

A calibrator, while important in adjusting monitors to achieve the proper settings, does not measure luminance directly. A light meter is typically used for measuring ambient light levels rather than the specific luminance output of display screens. A digital ruler measures distance and is not relevant to luminance testing. Therefore, the photo meter stands out as the specialized tool necessary for this specific quality assurance task.