Dose periférica em radioterapia: comparação entre diferentes equipamentos aceleradores lineares e mesmo equipamento com diferentes energias de fótons
DOI:
https://doi.org/10.15392/bjrs.v9i1.1135Keywords:
Dose periférica, Acelerador Linear, Tratamentos RadioterápicosAbstract
A dose de radiação fora do campo de tratamento de radioterapia pode ser uma preocupação clínica. Portanto, um método para predizer com precisão as doses periféricas recebidas pelos tecidos e a avaliação adequada das doses é necessário para a proteção radiológica de pacientes em tratamentos de radioterapia. O objetivo deste trabalho foi avaliar a dose recebida em áreas periféricas fora da área alvo para tratamentos com feixes de fótons de 6 MV e 15 MV de dois aceleradores lineares diferentes, usando um simulador antropomórfico, e assim comparar os valores obtidos entre os dois equipamentos e entre diferentes energias no mesmo equipamento. Embora os equipamentos e cuidados durante o planejamento busquem minimizar as doses fora da região de tratamento, observamos experimentalmente que mesmo usando tamanho de campo relativamente pequeno e a mesma dose, diferenças nas doses periféricas são observadas, considerando fótons da mesma energia de diferentes equipamentos aceleradores e fótons com energias diferentes empregadas no mesmo equipamento acelerador linear.
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INCA - Instituto Nacional do Câncer José de Alencar. Disponível em https://www.inca.gov.br. Acesso em setembro de 2020.
BETTA, E. FARISELLI, L. BERGANTIN, A. LOCATELLI, F. VECCHIO, A.D BROGGI, S. FUMAGALLI, M.L. Evaluation of the peripheral dose in stereotactic radiotherapy and radiosurgery treatments. Medical Physics, V 37, n 7, Pg 3587 - 3594. 2010.
VIGNA FILHO, EUGENIO DEL. FALCÃO, ROSSANA C.. Blindagem em Radioterapia: Técnica e Normas. Rio de Janeiro: Inca, 2000.
TAYLOR M. L. AND KRON T. Consideration of the radiation dose delivered away from the treatment field to patients in radiotherapy. J Med Phys. 2011;36(2):59–71.
MUTIC, S., KLEIN, E.E. A reduction in the AAPM TG-36 reported peripheral dose distributions with tertiary multileaf collimation. American Association of Physicists in Medicine Task Group 36. Int J Radiat Oncol Biol Phys. 1999; 44(4):947–53.
FRAASS B, GEIJN JV. Peripheral dose from megavolt beams. Med Phys. 1983;10:809–18.
MAGALHÃES, M N, LIMA, A C P. Noções de Probabilidade e Estatística. 7ª Edição, 3ª reimpressão revista. São Paulo: Edusp.
VAN DER GIESSEN P. Collimator-related radiation dose for different cobalt machines and linear accelerators. Int J Radiat Oncol Biol Phys. 1996;35:399–405.
KASE K, SVENSSON G, WOLBARST A, MARKS M. Measurements of dose from secondary radiation outside a treatment field. Int J Radiat Oncol Biol Phys. 1983;9:1173–83.
FRANCOIS P, BEURTHERET C, DUTREIX A. Calculation of the dose delivered to organs outside the radiation beams. Med Phys. 1988;15:879–883.
VAN DER GIESSEN P. PhD Thesis Dose outside the irradiated volume in radiotherapy.Gottingen Tilberg: The Netherlands; 1997a.
VAN DER GIESSEN P, HURKMANS C. Calculation and measurement of the dose to points outside the primary beam for Co-60 gamma radiation. Int J Radiat Oncol Biol Phys. 1993;27:717–24.
VAN DER GIESSEN P. Calculation and measurement of the dose at points outside the primary beam for photon energies of 6, 10 and 23 MeV. Int J Radiat Oncol Biol Phys. 1994;30:1239–46.
VAN DER GIESSEN P. Measurement of the peripheral dose for the tangential breast treatment technique with Co-60 gamma radiation and high energy X-rays. Radiother Oncol. 1997b;42:265–70.
VAN DER GIESSEN P, BIERHUIZEN W. Comparison of measured and calculated peripheral doses in patients undergoing radiation therapy. Radiother Oncol. 1997; 42:257–64.
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