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Monitors, viewing conditions and teleradiography
Calibrated monitors, dim room light and secure transmission let the same image look the same wherever it is read.
Display monitors
Images are judged on monitors, so the monitor is part of the imaging chain. Primary (diagnostic) displays, used by radiologists to interpret, have high resolution (several megapixels) and high maximum brightness, or luminance, measured in candelas per square meter (cd/m²). The radiographer's workstation monitor is used to check positioning, exposure and processing before sending to PACS, so it must be good enough to see motion, noise and artifacts. Diagnostic monitors are calibrated to the DICOM Grayscale Standard Display Function (DICOM Part 14), so equal steps in pixel value look like equal steps in brightness, and an image looks the same on any calibrated monitor.