Question

When decreasing or lowering the window level of a digital fluoro image, the image will demonstrate _ as compared to the original image.

1. no brightness change
2. decreased brightness
3. increased brightness

Answer 1

Decreasing the window level of a digital fluoroscopy image results in decreased brightness of the image as it alters the user's perception by changing the visible density range.

Step-by-step explanation:

When the window level of a digital fluoroscopy (fluoro) image is decreased, there tend to be changes in the perceived brightness of the image. In the context of medical imaging, the window level adjustment affects how bright or dark the image appears. Decreasing the window level typically makes the image appear darker, and as a result, the image will demonstrate decreased brightness compared to the original image.

Adjusting the window level is similar to setting the midpoint of the range of visible densities. When the level is moved down, areas that were previously displayed in lighter gray tones may now be shown in darker tones since the midpoint of the histogram of visible densities shifts. This manipulation does not affect the actual data within the image but does alter the user's perception by changing the range of densities that is visible on the display.