ALARA Principle
A fundamental radiation protection safety principle stating that all radiation exposures must be kept 'As Low As Reasonably Achievable' (ALARA).
Governing formula
Dose Optimization: Minimize Time, Maximize Distance, Optimize Shielding
SI unit
Radiation Safety Protocol
In depth
Mandates three primary protection strategies: minimizing exposure duration, maximizing distance from radiation sources (inverse-square law), and utilizing appropriate protective lead shielding.
Examples in the real world
Radiology technicians standing behind lead aprons and lead glass barriers during patient fluoroscopy procedures.