Which statement best expresses the practical application of ALARA in radiographic procedures?

• A. Radiation exposure should be kept as low as reasonably achievable.
• B. Exposure should be kept at zero at all times.
• C. Exposure should be maximized to reduce noise.
• D. Exposure should be consistent regardless of clinical need.

Answer: (A)

ALARA means we minimize radiation dose while still obtaining a diagnostically useful image. In practice, that means only performing imaging when it’s justified and adjusting technique to use the lowest exposure that will still meet the diagnostic needs. Techniques include using the smallest reasonable field size (collimation), proper shielding for patients and staff, selecting the lowest acceptable exposure factors, and avoiding repeat images by good positioning and technique. It also involves using modern equipment efficiently and applying dose-saving practices, such as appropriate filtration and avoiding unnecessary repeats.

This is why the statement about keeping exposure as low as reasonably achievable best captures the practical goal. Zero exposure isn’t always possible for diagnostic imaging, and increasing dose to reduce noise or keeping exposure the same regardless of clinical need would violate ALARA.