Electric Field from a Proton Beam in Biological Tissues for Proton Radiotherapy
(2018) Physical Review Applied — Vol. 10, n° 4, p. 44054 (2018)
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- Abstract
- We compute spatiotemporal profiles of the electric field coming from a one-dimensional proton beam as it moves through five different animal tissues: muscle, lung, fat, gray matter, and liver. The complex electric permittivity as a function of frequency is assumed to follow the Cole-Cole model, containing experimentally determined parameters for each tissue. The shape of the tissues is taken to be a cylinder with a radius of 10 cm. The initial proton energies are chosen so as to yield the same range (i.e., depth at which the protons stop) inside all tissues. We consider two beams, both of them a square pulse, lasting 10 and 100 ns. Our results show that for both beams the maximal radial electric field at the outer boundary of a tissue is on the order of 150 mV/cm for all five tissues. Furthermore, soon after the last proton in the beam comes to rest, the spatial profile of the radial electric field along the beam axis acquires a maximum that coincides with the proton range. The measurable magnitude of the electric field and its spatial profile lend themselves to an application in proton radiotherapy, where the proton range is an important quantity of interest. © 2018 American Physical Society.
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Albert, J., Labarbe, R., & Sterpin, E. (2018). Electric Field from a Proton Beam in Biological Tissues for Proton Radiotherapy. Physical Review Applied, 10(4), 44054. https://doi.org/10.1103/PhysRevApplied.10.044054 (Original work published 2018)