The window level is primarily used to adjust:

The window level is primarily used to adjust:

• A. Brightness
• B. Contrast
• C. Exposure index
• D. Focus sharpness

Answer: (A)

The window level sets the midpoint of the brightness range used to display the image, so it mainly adjusts how bright or dark the radiograph appears. Increasing the level makes the image look brighter by shifting the tonal display toward lighter shades, while decreasing it makes the image darker. This is separate from window width, which controls contrast by determining how wide that brightness range is. The exposure index is a measure of radiation exposure to the detector and isn’t changed by the window level, and focus sharpness relates to image sharpness rather than display brightness.

The window level sets the midpoint of the brightness range used to display the image, so it mainly adjusts how bright or dark the radiograph appears. Increasing the level makes the image look brighter by shifting the tonal display toward lighter shades, while decreasing it makes the image darker. This is separate from window width, which controls contrast by determining how wide that brightness range is. The exposure index is a measure of radiation exposure to the detector and isn’t changed by the window level, and focus sharpness relates to image sharpness rather than display brightness.