Which of the following is considered a type of grid error?

A grid error occurs when the alignment between the x-ray tube and the grid is not optimal, leading to image quality issues. The off-center error specifically refers to the misalignment of the x-ray beam relative to the grid. If the x-ray beam is not centered to the grid’s focal point, it can result in a significant drop in image density and produce grid lines or artifacts in the final radiographic image. This misalignment can happen if the patient is not positioned accurately or if the tube is not aligned properly over the grid.

The other types of grid errors also lead to image quality compromise, but from different misalignments. Off-distance pertains to the distance from the grid to the tube being outside the recommended range, which can affect image contrast and density. Center-angulation involves angling the x-ray tube inappropriately relative to the grid, leading to distortion. Upside-center refers to a situation where the grid is placed incorrectly, potentially affecting the x-ray beam's exposure. However, the term off-center directly denotes a specific misalignment between the x-ray tube and the grid that directly correlates with a common and well-recognized grid error in radiography.