Radiotherapy using hard wedges is no longer appropriate and should be discontinued

Njeh, Christopher F.; Suh, Tae Suk; Orton, Colin G.

doi:10.1118/1.4939262

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…It is a well known fact that due to increased use of advance radiotherapy techniques like IMRT, VMAT, SRT etc, and where the experts are debating that hard wedges in radiotherapy should be discontinued [15]. There are still lots of radiotherapy centers in the world having lack of resources, and they are using hard wedges and EDW/Virtual wedges so it is important to check periodical wedge profile reproducibility [16].…”

Section: Discussionmentioning

confidence: 99%

Penumbral Dose Characteristics of Physical and Virtual Wedge Profiles

Farrukh¹,

Ilyas²,

Naveed³

et al. 2017

IJMPCERO

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Purpose: Both physical and virtual wedges are used in radiotherapy to get uniform and desired dose distribution in clinical setting. All linear accelerators of different venders have computer controlled dynamic wedges called virtual wedge filters. Penumbra is one of the important photon beam characteristics needed to be understood in radiation therapy at the time of commissioning of Treatment Planning system (TPS) as well as applying various treatment planning algorithms in clinical applications. In this study we meas- 217Results & Conclusion: The results of one way ANOVA (Analysis of Variance) show that the deviations are significant with energy and the deviations are higher in lower energy than higher energy. The deviations increase as depth increases, the deviations are also significant with depth. The deviations increase with field sizes; the deviations as a function of field size are highly significant. The deviations are higher in PW than VW but the deviations with wedge type are in-significant. As wedge angle increases, deviations also increase and the effect of wedge angle is highly significant on deviations.

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Section: Discussionmentioning

confidence: 99%

Penumbral Dose Characteristics of Physical and Virtual Wedge Profiles

Farrukh¹,

Ilyas²,

Naveed³

et al. 2017

IJMPCERO

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“…Com o surgimento de novas tecnologias, como Field in Field, radioterapia de intensidade modulada (IMRT) e até mesmo o uso do filtro dinâmico, os filtros físicos passaram a ser uma tecnologia ultrapassada, pois além de modificar o feixe e a energia, eles são pesados e nada práticos 2 . O EDW utiliza movimento dos colimadores para a criação de perfis de dose semelhantes aos do filtro físico 1 .…”

Section: Introductionunclassified

Validação de Filtro Dinâmico em um acelerador linear Clinac 2100 CD

et al. 2018

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O filtro dinâmico otimizado (Enhanced Dynamic Wedge, EDW) utiliza o movimento do colimador para fazer o efeito de filtro, diminuindo o tempo de tratamento em relação ao filtro físico. Para validação do sistema foram feitas algumas comparações entre dados medidos e calculados pelo sistema de planejamento tais como: fluência de perfil de feixe; planos de tratamentos, utilizando a análise gama; Fator Filtro; e PDP. Os resultados da análise gama da comparação de fluência, tanto de perfil de feixe quanto para planos de tratamentos, foram entre 96% à 100% respectivamente, e, de Fator Filtro e PDP, a diferença máxima é de 1,9%. Assim os resultados se mostraram satisfatórios

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