Published August 1988 | Version v1
Report Open

A thyroid measurement method for monitoring laboratory workers exposed to I125

Creators

Description

We describe here the standardization of a technique for the estimation of 125I in the thyroid gland of laboratory workers involved with 125I labelling techniques. It is based on a comparison with a standard curve obtained by placing in a thyroid neck phantom various calibrated standard sources of 125I. Its sensitivity was calculated around 0,8 - 1,7 nCi. The precision of our measurements was avaliated in a range of 1.35 - 310.5 nCi and the coefficient of variation obtained varied from 2,2% to 26,3%. The accuracy of our ''in vivo'' measurements was checked by analyzing the influence of the shape and the size of the thyroid in the neck phantom. (author)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Portuguese)

Nos descrevemos aqui a padronizacao de uma tecnica para estimar o 125I na glandula tireoide de trabalhadores envolvidos em tecnicas de marcacao com 125I. Esta baseada na comparacao com a curva padrao obtida colocando num fantom de tireoide varias fontes padrao de 125I. Sua sensibilidade foi calculada entre 0,8 a 1,7 nCi. A precisao de nossas medidas foi valiada num intervalo de 1,35 a 310,5 nCi e o coeficiente de variacao obtido variou de 2,2% a 26,3%. A exatidao de nossas medidas ''in vivo'' foi verificada analisando a influencia da forma e do tamanho da tireoide no fantom de pescoco. (autor)

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Additional details

Publishing Information

Imprint Pagination
16 p.
Report number
IPEN-PUB--183

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
20018643
Subject category
S61: RADIATION PROTECTION AND DOSIMETRY;
Descriptors DEI
IODINE 125; PERSONNEL; RADIATION MONITORING; THYROID
Descriptors DEC
BETA DECAY RADIOISOTOPES; BODY; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENDOCRINE GLANDS; GLANDS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; IODINE ISOTOPES; ISOTOPES; MONITORING; NUCLEI; ODD-EVEN NUCLEI; ORGANS; RADIOISOTOPES