What includes both leakage and scattered radiation?

The correct choice is secondary protective barrier. Secondary protective barriers are designed to protect individuals from scattered radiation and leakage radiation that can occur in facilities using radiographic equipment.

Leakage radiation refers to the radiation that escapes from the imaging container or tube, while scattered radiation is produced when the primary beam interacts with materials in the environment, such as walls or the patient. Since secondary protective barriers are strategically placed around areas where radiation may scatter and leak, they effectively shield against both types of radiation, ensuring safety for operators and the public in proximity to radiographic operations.

In contrast, while primary protective barriers are meant to protect against the primary beam of radiation during an exposure, control panel shields primarily shield the operator from direct exposure to the beam and do not address leakage or scattered radiation. External radiation is a broader term that encompasses all radiation that is outside the radiation source, without specifically relating to the protective considerations in a radiography context.