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ALARA (As Low As Reasonably Achievable)

A very important principle in radiation protection. It is designed to use the minimum amount of radiation to produce an adequate test. Very commendable efforts have been made in recent years in Quebec to follow this principle as closely as possible, particularly concerning the doses used during CT examinations. Note that the evaluation of the relevance of a radiological examination, and its replacement by a method that does not use X-rays are an integral part of this system (e.g. abdominal ultrasound or magnetic resonance imaging used instead of a CT scan.) 
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