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490 ST 6.2 – Protección radiológica de Trabajadores II (orientada a la medicina)
OCCUPATIONAL DOSES IN PEDIATRIC BARIUM MEAL PROCEDURES
Filipov, Danielle 1; Reuters Schelin, Hugo2 ; Deniak, Valeriy1;
Paschuk, Sergei1; Legnani, Adriano 2;
Ledesma, Jorge Alberto2; Sauzen Jessica1
1 Universidade Tecnológica Federal do Paraná. Brasil.
2 Instituto de Pesquisa Pelé Pequeno Príncipe. Brasil.
* Autor responsable, email: dfilipov@utfpr.edu.br
Ionizing radiation has become an indispensable tool when it comes to diagnosis and therapy.
However, its use should happen in a rational manner, taking into account the risks to which the
staff is being exposed. Barium meal (BM), or upper gastrointestinal (GI) studies, using
fluoroscopy, are widely used for gastroesophageal reflux disease diagnostic in children and
professionals are required to stay inside the examination room to position and immobilize
pediatric patients during the procedure. Therefore, it is very important that professionals strictly
follow the technical standards of radiation protection. According to the ICRP recommendation,
the annual limit equivalent doses for eyes, thyroid and hands are, respectively, 20 mSv, 150
mSv and 500 mSv. Based on those data, the aim of the current study is to estimate the annual
equivalent dose for eyes, thyroid and hands of professionals, who perform BM procedures in
children. This was done using properly package LiF:Mg,Cu,P thermoluminescent dosimeters
(TLDs) in 32 procedures; 2 pairs were positioned near each staff´s eye, 1 pair on each
professional´s neck and 2 pairs on both staff´s hands. The results of the estimative of annual
equivalent doses, for eyes, thyroid and hands, are, respectively: 14 – 30 mSv, 9 – 13 mSv and
17 – 52 mSv. Only the closest staff to the patient exceeded the annual equivalent doses in the
eyes (around 50% higher than the limit set by ICRP). However, the results from this study,
about occupational doses, for hands and thyroid, compared to similar studies, show higher
values. Therefore, the optimization implementation is necessary, so that the radiation levels can
be reduced.