Evaluation of a new hybrid VMAT simultaneous integrated boost technique for breast radiotherapy

Abstract

Abstract:In this survey we propose a new hybrid simultaneous integrated boost (SIB) delivery method for breast radiotherapy that was implemented in our department of Radiation Oncology. This technique encompasses nonmodulated tangential fields as well as VMAT-arcs and combines the robustness and the dose confinement properties of tangential opposed fields with the benefits of a complex VMAT-technique. The results of the dosimetric evaluation indicate that the proposed technique enables a balanced mix between dose coverage, homogeneity and conformity versus the exposure of the organs-at-risks. More precisely, the proposed technique is on par with other recently published SIB techniques for breast radiotherapy.

Breast boost vector: a new metric proposed to optimise isocentre location in an fIMRT–VMAT hybrid technique for a simultaneous integrated boost in breast radiotherapy

“…To overcome potential issues such as adjoining nodes irradiation or additional dose escalation of the tumour bed in a simultaneous integrated boost (SIB) scheme, volumetric-modulated arc therapy (VMAT) is being implemented to whole breast irradiation or for partial arcs in hybrid techniques. [5][6][7] Standard of care for boost breast radiotherapy is to administer radiation sequentially to the whole breast and then to the tumour bed. Nevertheless, SIB techniques are currently under study whether they are more or equally effective compared to conventional schemes.…”