*Medical Class video monitors employ Look Up Tables (LUTs) to help adjust the image quality from an external source to match the characteristics of the video system. This helps ensure the image looks like it did at the source. When the Look Up Table is defective, or programmed incorrectly, certain information in the image is not displayed properly. The left and right bands highlighted by yellow should be uniform, but are not because of LUT distortion. On an image, this would appear as black and white specks, possibly mimicking anatomy.