How are grids classified?

Grids are classified based on their design and function in radiographic imaging, which includes parallel, focused, linear, or crossed configurations.

Parallel grids have lead strips that run parallel to one another without angling, allowing for some scatter radiation to pass through but having limitations on image clarity at angles. Focused grids, on the other hand, have lead strips that are angled to match the divergence of x-ray beams from a specific focal point, effectively reducing scatter and improving image quality at designated distances. Linear grids consist of lead strips arranged in a linear fashion in one direction, while crossed grids have lead strips aligned in two perpendicular directions, which provides maximum scatter rejection but requires precise alignment of the x-ray beam.

This classification is crucial for professionals in radiology as it helps determine the appropriate grid type to use based on the specific imaging situation, patient size, and the examination being performed. Understanding these grid types aids in optimizing image quality while minimizing patient radiation exposure.