What does ALARA stand for and how is it applied in dental radiography?

• A. Always Low As Reasonable Adjustments.
• B. As Low As Reasonably Achievable; minimize exposure by proper technique, shielding, limiting exposures, and appropriate settings.
• C. As Light As Radiation Allows.
• D. Any Level Adjusted to Risk Assessment.

Answer: (B)

ALARA means As Low As Reasonably Achievable. In dental radiography, this means actively reducing radiation exposure to patients and operators while still obtaining diagnostically useful images. You apply it by using proper technique and positioning to avoid retakes, selecting appropriate exposure settings for the patient’s size, and leveraging dose-saving methods. Using fast image receptors or digital sensors, tightening beam collimation to the area of interest, and employing shielding such as lead aprons and thyroid collars when appropriate all help limit dose. Regular equipment maintenance and sticking to the minimum necessary number of images further support ALARA, ensuring you get the needed diagnostic information with the smallest possible exposure.

The other options either misstate the acronym or misrepresent the approach to radiation safety, which is not about permissive or arbitrary exposure but about deliberate reduction of dose through technique, shielding, limited exposures, and proper settings.