title: Performance of dose calibrators in Brazilian hospitals for activity measurements.
abstract: In order to obtain information on the accuracy of activity measurements in Brazilian hospitals, several intercomparison exercises have been organized since 1998. The first exercise consisted of two intercomparison runs of 131I and 99mTc and had the participation of 21 hospitals localized in Rio de Janeiro city and surroundings. The second, with 131I (47 hospitals) and 123I (12 hospitals), had the participation of hospitals localized in the whole country. The results were analyzed under the statistical point of view and conformity to the norms of Regulatory Authority. These results have shown that such exercises are necessary to improve the quality of the measurements and to identify those instruments that are producing incorrect values.
authors.affiliation: Laboratorio Nacional de Metrologia das Radiações Ionizantes Instituto Radiocoes/Instituto de Radioproteção e Dosimetria/Comissão Nacional de Energia Nuclear, Rio de Janeiro, Brazil. iwahara@ird.gov.br
authors.forename: A
authors.initials: A
authors.lastname: Iwahara
authors.forename: A E
authors.initials: AE
authors.lastname: de Oliveira
authors.forename: L
authors.initials: L
authors.lastname: Tauhata
authors.forename: C J
authors.initials: CJ
authors.lastname: da Silva
authors.forename: C P G
authors.initials: CP
authors.lastname: da Silva
authors.forename: A M S
authors.initials: AM
authors.lastname: Braghirolli
authors.forename: R T
authors.initials: RT
authors.lastname: Lopes
mesh_terms: D001938:Brazil; D006761:Hospitals; D006801:Humans; D007457:Iodine Radioisotopes / Q000032:analysis / Q000592:standards; D011868:Radioisotopes / Q000032:analysis* / Q000592:standards*; D011874:Radiometry / Q000592:standards*; D012015:Reference Standards; D013667:Technetium / Q000032:analysis / Q000592:standards; D013679:Technology, Radiologic
chemical_list: D007457:Iodine Radioisotopes; D011868:Radioisotopes; D013667:Technetium