Which lead apron thickness offers close to 100% protection at most kVp levels?

The choice of 1.0 mm lead apron thickness is favored for offering close to 100% protection at most kilovolt peak (kVp) levels, particularly in diagnostic radiology. The lead apron serves as a radiation shield, and its effectiveness in absorbing radiation is primarily determined by its thickness.

At most kVp levels typically encountered in medical imaging, such as those used in X-ray or fluoroscopy procedures, a lead apron with a thickness of 1.0 mm provides sufficient protection against scatter radiation, significantly reducing the dose of radiation that reaches the wearer. This thickness is a standard in many clinical settings because it balances adequate protection while being manageable in terms of weight for the user.

Thicker aprons, while providing even more protection, may not be practical for prolonged use due to increased weight, which can lead to fatigue for the wearer. Thus, the 1.0 mm thickness is often viewed as the optimal choice for safety in environments where exposure to radiation is possible.