What display monitoring within a PACS workflow primarily supports QA?

• A. Scheduling patient appointments.
• B. Adjusting detector exposure indices.
• C. Detecting and addressing display luminance and contrast consistency.
• D. Setting LUT values automatically.

Answer: (C)

Display monitoring in a PACS workflow is all about keeping the viewing devices reliable so radiologists see images the same way every time. The main idea is to verify and maintain how a monitor renders brightness and the range of grayscale, because these factors directly affect what a clinician perceives on the screen. Regular QA checks use a photometer to measure the monitor’s luminance performance—both its maximum and minimum brightness—and to ensure the brightness is uniform across the screen. They also verify that the grayscale response remains consistent, so the mapping of image data to visible shades of gray is stable, often aligning with the DICOM grayscale standard (GSDF). When luminance or grayscale drift occurs, contrast perception can change, which could hide subtle findings or alter their appearance. By routinely detecting and correcting these changes, the display supports reliable image interpretation throughout the PACS workflow.

Scheduling patient appointments is outside of image quality concerns. Adjusting detector exposure indices relates to how images are captured rather than how they are displayed for QA. Setting LUT values automatically touches image processing or workflow automation rather than ongoing verification of display performance.