Which process is used to display the digital image with the ideal brightness and contrast?

• A. Histogram analysis
• B. Rescaling
• C. Lookup table (LUT) adjustments
• D. Digitization

Answer: (C)

The way to display a digital radiograph with the intended brightness and contrast is by using a lookup table (LUT) adjustments. The raw pixel values are mapped through the LUT to display grayscale levels, and this mapping sets the window level (brightness) and window width (contrast) so diagnostic features pop out appropriately. Histogram information often guides the choice of window settings because it shows how pixel values are distributed, but the actual display change comes from the LUT. Other options don’t directly control the final displayed brightness/contrast: rescaling would alter the data range in a broader sense, and digitization is the process of converting analog signals to digital form, not how the final image is displayed.