Which statement best reflects ALARA in dental radiography?

• A. Use as many films as possible to ensure diagnostic quality
• B. Only expose when necessary and minimize exposure while maintaining image quality
• C. X-ray exposure should be minimized to the lowest possible level consistent with diagnostic needs
• D. Ignore radiation safety guidelines

Answer: (C)

ALARA means keeping radiation exposure as low as reasonably achievable for a given diagnostic task. In dental radiography, that translates to obtaining an image with the smallest amount of radiation that still provides a usable, diagnostic-quality result. The best statement expresses this balance precisely: exposures should be minimized to the lowest possible level that still meets diagnostic needs. It emphasizes not only reducing dose but doing so without compromising the image quality needed to diagnose.

In practice, applying ALARA involves choosing appropriate exposure factors, using fast digital sensors or films, applying proper beam restriction (such as rectangular collimation), shielding like lead aprons and thyroid collars, and avoiding retakes. Excessive film counts or unnecessary exposures simply increase dose without improving diagnostic value, and ignoring safety guidelines is incompatible with ALARA.