RTBC Advanced Exposure Factors Practice Test

When obtaining radiographs of smaller extremities, a moving grid is not necessary because smaller extremities typically generate lower amounts of scatter radiation compared to larger body parts. A stationary grid is sufficient in these cases to improve image quality by reducing scatter.

The need for high kVp or increased exposure time can often be dictated by the specific imaging requirements. Smaller extremities can still require adequate penetration of tissue, and a high kilovolt peak (kVp) level may occasionally be used to ensure sufficient contrast. Increased exposure time is not commonly necessary either, as smaller extremities often have less thickness, enabling effective imaging with standard exposure settings.

Using a moving grid is generally reserved for larger areas where there is a significant risk of scatter, which would warrant the need for a device that compensates for movement and enhances clarity over a larger field. Hence, for smaller extremities, a stationary grid suffices, affirming that a moving grid is not a requirement.