What does ALARA stand for?

• A. As Low As Reasonably Achievable
• B. As Light As Readily Achievable
• C. As Low As Readily Acceptable
• D. As Long As Radiation is Acceptable

Answer: (A)

The idea behind ALARA is to keep radiation exposure as low as reasonably achievable, and to do so by actively reducing dose while considering practicality, cost, and benefit. In practice, this means using the smallest necessary exposure settings, maximizing distance from the source, and using shielding or procedural controls to cut dose without compromising the goal. The phrase that best captures this balance is As Low As Reasonably Achievable, because it emphasizes both striving for the lowest possible dose and recognizing limits set by feasibility and resources.

The other options don’t fit because they replace or miss the essential idea of balancing dose reduction with what’s feasible. They imply being “readily acceptable,” “readily achievable,” or “acceptable” in a way that doesn’t convey ongoing optimization or the proactive pursuit of lower exposure. ALARA is about proactive optimization, not waiting for exposure to be deemed acceptable. It also isn’t about reducing dose to a simple absolute minimum or about “as light” or “as long as” the radiation is acceptable.