What is a typical outcome of using an upside-down grid?

Using an upside-down grid can lead to a phenomenon known as the edge effect or grid cut-off. This occurs when the primary x-ray beam is misaligned with the grid, which is designed to reduce scatter radiation and improve image quality. When the grid is turned upside down, the alignment is compromised, causing a significant reduction in exposure at the edges of the image.

The correct answer points to severely underexposed areas at the edges due to the incorrect orientation of the grid, which prevents the necessary x-rays from reaching the image receptor effectively. This misalignment leads to a decreased amount of radiation at the edges while the center may receive more consistent exposure, resulting in a contrast where the center appears adequately exposed, but the periphery is significantly darker. Understanding this principle is crucial for technologists to ensure optimal imaging outcomes and avoid artifacts caused by equipment misalignment.