This type of exposure results from radiation emitted by a radioactive source
outside the body. Implant and radiopharmaceutical therapies may result in this
type of exposure.
- Minimize Time - minimizing the time spent around a source of
radiation will reduce the total exposure to radiation. Normally, physicians will
try to minimize the amount of direct patient care.
- Maximize Distance - maximizing the distance from a source of
radiation will reduce the total exposure to radiation. Because the radiation
levels decreases rapidly with distance, even small increases is distance can
have a large impact on reducing the total radiation exposure.
- Use Shielding - staying behind the shields as much as possible will
reduce the total exposure to radiation. In patient rooms the
shields are kept at the door to shield all staff and visitors, as well as
discourage accidental entry without proper protective gear. The shields
are only placed beside the bed during brachytherapy when patients rarely
get out of their beds.