The justification principle must be respected first because the best way to protect the patient is not to carry a useless test. Radiation protection of patients is based on the application of 2 major radiation protection principles, justification and optimization. apply only to diagnostic procedures and does not apply to radiotherapy. These levels are expected not to be exceeded for standard procedures when good and normal practice regarding diagnostic and technical performance is applied'. ![]() ![]() Application of diagnostic reference levels in medical practiceĮnergy Technology Data Exchange (ETDEWEB)īourguignon, Michel [Faculty of Medicine of Paris, Deputy Director General, Nuclear Safety Authority (ASN), Paris (France)ĭiagnosis reference levels (D.R.L.) are defined in the Council Directive 97/43 EURATOM as 'Dose levels in medical radio diagnosis practices or in the case of radiopharmaceuticals, levels of activity, for typical examinations for groups of standards-sized patients or standards phantoms for broadly defined types of equipment.
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