ALARA Principle — NDEB AFK MCQ
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Correct answer: D — As Low As Reasonably Achievable
ALARA (As Low As Reasonably Achievable) is the fundamental principle of radiation protection. It requires that dental practitioners use the lowest radiation dose necessary to obtain diagnostically adequate images. Methods include proper technique selection, rectangular collimation (reduces dose by up to 60% compared to round collimation), fastest available receptor (digital or F-speed film), proper exposure parameters, and lead apron with thyroid collar.
Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019