Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications.
Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications.
复制标题
用于放射治疗应用的聚焦VHEE(非常高的能电子)梁和剂量递送。
DOI:
10.1038/s41598-021-93276-8
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发表时间:
2021-07-07
影响因子:
4.6
通讯作者:
Jones RM
中科院分区:
文献类型:
--
作者:
Whitmore L;Mackay RI;van Herk M;Jones JK;Jones RM
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.
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