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[en] For the initial estimate of absorbed radiation dose, following the Goiania accident, the frequencies of unstable chromosome exchanges (dicentrics and rings) in blood lymphocytes stimulated in vitro were determined. Using a dose response curve for induction of unstable aberrations following in vitro irradiation with Cs137 gamma-rays, dose estimates were made. Several of the victims have been followed up till 1993 and the frequencies of dicentrics have been determined (Ramalho et al., 1994). Using the chromosome 'painting' technique, the frequencies of stable chromosomal aberrations (translations) have been determined. The validity of using the frequencies of translocations for retrospective biological dosimetry of past radiation exposures has been examined and the results are presented. (author)
Source
International Atomic Energy Agency, Vienna (Austria); European Commission, Brussel (Belgium); Comissao Nacional de Energia Nuclear (CNEN), Instituto de Radioprotecao e Dosimetria, Rio de Janeiro, JR (Brazil); Forschungszentrum fuer Umwelt und Gesundheit (GSF), Institut fuer Strahlenschutz, Neuherberg (Germany); 294 p; ISSN 1011-4289; 
; May 2000; p. 127-132; International workshop on restoration of environments affected by residues from radiological accidents: Approaches to decision making; Rio de Janeiro (Brazil); 29 Aug - 2 Sep 1994; 13 refs, 1 fig., 1 tab
; May 2000; p. 127-132; International workshop on restoration of environments affected by residues from radiological accidents: Approaches to decision making; Rio de Janeiro (Brazil); 29 Aug - 2 Sep 1994; 13 refs, 1 fig., 1 tab