Grid ratio is based on the relationship of the:

The grid ratio is a crucial aspect of radiographic imaging that helps determine the effectiveness of a grid in reducing scatter radiation. It specifically refers to the relationship between the height of the lead strips in the grid and the width of the spaces between those strips.

A higher grid ratio indicates that the lead strips are taller relative to the interspace width, which helps increase the grid's ability to absorb scattered radiation while allowing more of the primary radiation to reach the film or digital detector. This design is vital for enhancing image contrast and quality by minimizing unwanted scatter, especially in procedures where high-quality images are essential.

Understanding this relationship is important for radiologic technologists and operators, as the grid ratio directly impacts the efficiency and effectiveness of the imaging process, guiding their decisions on selecting appropriate grid types for different imaging situations.