How does a higher grid ratio affect scatter radiation?

A higher grid ratio significantly improves the ability to absorb scatter radiation. Grids are designed to allow primary radiation (the radiation coming from the source) to pass through while blocking as much scatter radiation as possible. The ratio refers to the height of the lead strips in the grid compared to the distance between them. A higher grid ratio means taller lead strips relative to the distance apart, which effectively increases the amount of scatter radiation that is removed from the image. As a result, the image quality is enhanced because it reduces the fog that scatter radiation introduces, making it easier to distinguish between various tissues on radiographic films.

The other choices do not accurately relate to the primary function of grid ratios in managing scatter radiation. While factors like film sensitivity, patient motion, and simulator film placement are important in the broader context of medical imaging and dosimetry, they do not directly align with the specific impact of grid ratios on scatter radiation management.