Influence dosimetric study of different couches in radiotherapy treatments
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Brazilian Journal of Radiation Sciences
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Radiotherapy is a recommended procedure for 52% of cancer cases, in average, as one of the treatment forms,
therefore, it is important for the clinical practice to investigate the affecting factors in dose distribution received
by the patients, such as immobilization devices and treatment couch. With the introduction of treatments with
modulated intensity techniques like IMRT and VMAT, the number of incidence fields used for patient treatment
increased, making couch’s dosimetric effect more significant in these modalities. The attenuation data
acquisition referring to the treatment couches, as well as the TPS data evaluation, show important parameters
for the clinical practice because they influence what happens with the dose delivery during the treatment,
ensuring a better quality and safety to the treatments. This research presents experimental results evaluating
the couch’s impact in the treatments by a study of perturbation in the distribution of surface dose, and dose
attenuation according to the gantry’s angle for the couches BrainLABTM, ExactTM and iBEAMTM. Then we
propose better density values for the couches BrainLABTM and ExactTM for their inclusion in EclipseTM TPS.
Lastly, we compare the dose difference considering the presence or not of couch in the planning. In conclusion,
the beam’s attenuation increase by the couches and the doses alterations on the skin must be taken in
consideration in the treatment planning process. It is of great relevance that each treatment center perform
internal tests to determinate the best density values for available TPS.
Como referenciar
DEL NERO, R.A.; EMILIOZZI, C.Z.S.; SIQUEIRA, P.T.D.; ANTUNES, P.C.G.; SERANTE, A.R. Influence dosimetric study of different couches in radiotherapy treatments. Brazilian Journal of Radiation Sciences, v. 10, n. 2, p. 1-24, 2022. DOI: 10.15392/bjrs.v10i2.2018. Disponível em: http://repositorio.ipen.br/handle/123456789/33222. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.