Which of the following is a requirement under fluoroscopic regulations to limit patient exposure?

The requirement that tabletop intensity must not exceed 21 mGya/min is consistent with the regulations established to minimize patient exposure during fluoroscopic procedures. This limit is set to ensure that the dose of radiation received by the patient is controlled and kept as low as reasonably achievable, promoting patient safety during diagnostic interventions.

The 21 mGya/min maximum intensity is particularly important because fluoroscopy can involve prolonged exposure times, and exceeding this limit could lead to significant radiation dose accumulation, increasing the risk of potential harmful effects. This regulation is in place to protect patients while still allowing healthcare providers to obtain the necessary diagnostic information.

In contrast, other options do not align with the established regulations aimed at reducing patient exposure. For example, while the tabletop intensity of 30 mGya/min could still allow for higher exposure rates, it does not satisfy the stricter limit designed to protect patients. Additionally, the parameters regarding kVp settings and minimum source-to-skin distance (SSD) must adhere to specific guidelines that focus on imaging quality and safety, but they do not directly correspond to the limit on tabletop intensity as a primary measure of controlling patient exposure during fluoroscopy.