What does the ALARA principle stand for in dental radiography?

• A. As Late As Reasonably Achievable
• B. As Low As Reasonably Achievable
• C. Always Low And Reasonably Achievable
• D. As Low As Reasonably Achievable

Answer: (D)

ALARA in dental radiography means keeping radiation exposure as low as reasonably achievable. This principle guides us to minimize patient dose while still obtaining the necessary diagnostic information. In practice, it means using the smallest field size with proper collimation, selecting appropriate exposure factors, using faster receptors, and applying shielding like lead aprons and thyroid collars. It also involves avoiding retakes, maintaining good technique, and using digital processing or other dose-saving technologies to achieve usable images without unnecessary exposure. The other options use incorrect wording (such as “Late”) or imply an incorrect or nonstandard phrasing; the established phrase is “As Low As Reasonably Achievable.”