General principles of ALARA


The guiding principles for radiation protection in medicine are:

  1. Justification: The exam must be medically indicated.
  2. Optimization: The exam must be performed using doses that are As Low As ReasonablyAchievable (ALARA), consistent with the diagnostic task.
  3. Limitation: While dose levels to occupationally exposed individuals (i.e. the radiologist or technologist) are limited to levels recommended by consensus organizations, limits are not typical for medically-necessary exams or procedures.

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