What term describes the height of the lead strips in a radiographic grid in relation to the distance between them?

The height of the lead strips in a radiographic grid relative to the distance between them is referred to as the grid ratio. This term is significant because it quantitatively expresses how effective a grid is at absorbing scattered radiation while allowing primary radiation to pass through. A higher grid ratio indicates taller lead strips in comparison to the distance between them, thereby improving the grid’s ability to reduce scatter and enhance image contrast.

Grid conversion pertains to the adjustments made to the exposure factors when using a grid, while grid frequency refers to the number of lead strips per unit of length (typically measured in lines per centimeter or inch). Grid efficiency speaks to how effectively a grid can clean up scatter radiation, but it does not specifically define the relationship between the height of the lead strips and their spacing. Thus, grid ratio accurately encapsulates the physical relationship described in the question.