DOG ABDOMEN: Underexposure of edges due to an upside down focused grid. The centerlines of the grid would sill allow the x-ray through, but the outer lines would not be lined up with the x-ray beam. DOG LEG: The grid lines run the long way of the cassette. Here only half of the cassette was exposed at a time, and therefore the x-ray beam and the grid lines were not properly centered.
