Which of the following is the highest percentage of beam attenuation achieved by a 0.5-mm apron?

The highest percentage of beam attenuation achieved by a 0.5-mm apron is 99%. This level of attenuation is significant because it indicates the effectiveness of the apron in reducing radiation exposure to the wearer. A 0.5-mm lead equivalent apron is specifically designed to provide adequate protection for individuals who work in environments with potential radiation hazards, such as medical imaging, radiation therapy, or other fields involving radiation use.

In this context, the attenuation percentage reflects the proportion of radiation that is absorbed or scattered by the protective material rather than passing through. A 99% attenuation means that only 1% of the radiation can potentially reach the person wearing the apron, which is quite effective and essential for minimizing health risks associated with radiation exposure.

Understanding the specifications of protective equipment is crucial in maintaining safety standards, which is why recognizing that a 0.5-mm apron can achieve around 99% attenuation underscores its importance in personnel protection strategies.