AI Article Synopsis
- The studies focused on assessing how a 60 MeV proton beam's depth dose distribution is affected by dedicated mesh-formed collimators, which create mini-beams.
- These mini-beams allow for uniform energy distribution in the target area while protecting surrounding tissues, like eyelid skin, during hypofractionated radiation therapy.
- Experimental validation involved testing various mesh sizes in solid and water models, revealing that a 1 mm mesh led to increased scattering of mini-beams, with less scattering observed at larger collimator diameters.
Article Abstract
The aim of these studies was to investigate depth dose distribution of a 60 MeV proton beam formed by a set of dedicated mesh-formed collimators. The set of mini-beams formed by the mesh is scattered in the tissue and lead to uniform energy deposition in the target volume. The rationale is to protect the eyelid skin from complications after hypofractionated radiation therapy. The experimental verification of the depth dose distribution for collimators of 1-3 mm mesh size was performed in solid state and water phantoms on 60 MeV proton beam from the AIC-144 cyclotron. The measurements were accompanied by Monte Carlo calculations of proton transport using the FLUKA code. The result demonstrate that the smallest mesh diameter of 1 mm leads to fast broadening of the resulting mini-beams due to multiple proton scattering in the collimator. The effect is diminishing with growing collimator diameter.
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| http://dx.doi.org/10.1093/rpd/ncy015 | DOI Listing |
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