Which factor does NOT affect scattered radiation?

The factor that does not affect scattered radiation is exposure time. Scattered radiation is primarily influenced by the characteristics of the radiation beam and the properties of the materials it interacts with during its passage.

Field size significantly impacts the amount of scattered radiation because a larger area being irradiated allows for a greater volume of material to produce scatter. Similarly, tissue density plays a critical role; denser tissues can scatter more radiation compared to less dense ones, as the likelihood of interaction increases. Additionally, part thickness influences scatter, as thicker parts yield more interactions and potential scatter compared to thinner parts.

In contrast, while exposure time determines the quantity of radiation delivered, it does not directly alter the capability of materials to scatter that radiation. Thus, it does not have a direct effect on the scattered radiation produced. Understanding these distinctions is crucial for managing exposure and ensuring safety in radiographic procedures.