"Justification "
"Optimisation "
Expected headings
"Justification "
"Optimisation "
"Dose limits"
"The justification principle is anecdotally known as the benefit vs risk principle; that is, an individual's exposure to medical radiation should always have a greater benefit to the patient as to outweigh the negative consequences of the proposed examination. For example, the benefit in requesting a CT brain for a patient that has suffered significant head trauma generally outweighs any negative outcomes associated with that radiation exposure 1."
"Optimisation is also known at the as low as reasonably achievable (ALARA) principle. That is, medical radiation exposures should always be kept as low as achievable to ensure it is employed optimally. There is a particular focus on the term achievable, as medical radiation exposure lower than achievable can result in non-diagnostic examinations 1."