Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications
Affiliation
Department of Physics and Astronomy, University of Manchester, Manchester, UK.Issue Date
2021
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This paper presents the first demonstration of deeply penetrating dose delivery using focused very high energy electron (VHEE) beams using quadrupole magnets in Monte Carlo simulations. We show that the focal point is readily modified by linearly changing the quadrupole magnet strength only. We also present a weighted sum of focused electron beams to form a spread-out electron peak (SOEP) over a target region. This has a significantly reduced entrance dose compared to a proton-based spread-out Bragg peak (SOBP). Very high energy electron (VHEE) beams are an exciting prospect in external beam radiotherapy. VHEEs are less sensitive to inhomogeneities than proton and photon beams, have a deep dose reach and could potentially be used to deliver FLASH radiotherapy. The dose distributions of unfocused VHEE produce high entrance and exit doses compared to other radiotherapy modalities unless focusing is employed, and in this case the entrance dose is considerably improved over existing radiations. We have investigated both symmetric and asymmetric focusing as well as focusing with a range of beam energies.Citation
Whitmore L, Mackay RI, van Herk M, Jones JK, Jones RM. Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications. Sci Rep. 2021 Jul 7;11(1).Journal
Scientific ReportsDOI
10.1038/s41598-021-93276-8PubMed ID
34234203Additional Links
https://dx.doi.org/10.1038/s41598-021-93276-8Type
ArticleLanguage
enae974a485f413a2113503eed53cd6c53
10.1038/s41598-021-93276-8
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