Protective aprons must be worn if one is likely to receive how much radiation?

Protective aprons are essential for minimizing radiation exposure to personnel during fluoroscopy and other imaging procedures. According to safety regulations, protective clothing, such as lead aprons, should be worn when individuals are likely to receive exposure to radiation at levels that could potentially exceed established safety thresholds.

The correct choice mentions 5 mrads/hr (millirads per hour), which aligns with safety guidelines that typically indicate the necessity for protective measures when exposure is expected to be at or above this level. This threshold is designed to safeguard healthcare workers from cumulative radiation doses that could lead to health risks over time.

In contrast, options involving rad/hr and rads/min represent significantly higher levels of exposure that would indicate a need for immediate corrective actions rather than just protective clothing. Rad (radiation absorbed dose) is a larger unit than millirad, making the potential exposure levels in those choices much higher and typically less frequent in clinical environments where personnel would normally be protected with aprons.

Therefore, the threshold of 5 mrads/hr is a reasonable and established point at which wearing protective aprons is considered prudent to ensure safety in a radiological setting.