Final answer:
Increasing the window level of a digital fluoro image increases the overall brightness of the image.
Step-by-step explanation:
When increasing the window level of a digital fluoro image, the image will demonstrate increased brightness as compared to the original image. The window level in digital imaging corresponds to the midpoint of the range of greyscale values that will be displayed. Adjusting the window level higher makes the midpoint value more bright, causing the overall appearance of the image to be lighter, and thus increasing the brightness of the image. It's similar to adjusting the 'brightness' on a standard photograph; as you increase the brightness, more details might become visible particularly in the darker areas of the image.