What distinguishes raw image data from the processed display image in DR?

• A. Raw data are unprocessed pixel values from the detector; processed display image has LUT, window/level, and filters applied.
• B. Raw data are the final display image; processed image is unprocessed.
• C. Raw data contain color information; processed image is grayscale.
• D. Raw data and processed image are identical.

Answer: (A)

In DR, raw data are the unprocessed pixel values captured directly by the detector; they exist as a numerical array representing the detected radiation intensities, with a wide dynamic range and no viewing adjustments applied yet. The processed display image is produced from those raw values by applying the display-oriented processing steps: a look-up table (LUT) maps the raw values to display grayscale levels, window width and window level adjust brightness and contrast, and filters or noise-reduction may be applied to enhance visibility. This processing makes the image suitable for interpretation on a monitor, whereas the raw data remain as the original sensor measurements pending any further processing.