What is the main objective of ALARA in radiology protection?

• A. Always retard exposure regardless of image quality.
• B. Avoid any imaging procedures.
• C. Maintain image quality even if it requires higher radiation.
• D. Keep doses As Low As Reasonably Achievable while obtaining diagnostic results.

Answer: (D)

ALARA means keep radiation doses as low as reasonably achievable while still obtaining the necessary diagnostic information. This principle guides every radiology decision: justify the study, optimize the technique to use the smallest dose that yields acceptable image quality, and employ dose-saving practices such as proper collimation, shielding, filtration, and minimizing repeats. It also considers practical factors—cost, technology, and clinical need—so you don’t pursue reductions that compromise patient care.

That’s why the choice emphasizing the lowest dose possible while still achieving diagnostic results is the best fit. The idea of avoiding imaging entirely isn’t practical, nor is imposing higher doses just to squeeze out better image quality, and simply delaying exposure regardless of image quality ignores the clinical need for an adequate study.