Which term corresponds to the safety guideline to minimize exposure to ionizing radiation?

• A. ALARA
• B. Absorption
• C. Analog to Digital Converter
• D. Artifact

Answer: (A)

The idea being tested is ALARA, which stands for As Low As Reasonably Achievable. It’s the safety mindset that every dental radiograph should be taken with the minimum radiation dose necessary to obtain a diagnostic-quality image. In practice, this means optimizing technique and equipment so you reduce exposure without losing the needed information. Use fast digital sensors or high-speed film, apply proper filtration, and restrict the beam with rectangular collimation. Position the patient and equipment carefully to avoid retakes, and choose exposure settings (kVp, mA, time) that achieve image quality with the least dose. Shielding as appropriate and minimize the number of repeats all support keeping dose as low as possible over time.

Absorption describes how radiation energy is deposited in tissues and is a physical process, not a safety guideline. An Analog to Digital Converter is an electronic device that converts signal kinds and has no relation to radiation safety principles. An Artifact is an image irregularity or distortion and also does not address safety practices.