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@ARTICLE{Shaikh:289786,
author = {S. Shaikh and S. Escribano-Rodriguez and R. Radogna and L.
Kelleter$^*$ and C. Godden and M. Warren and D. Attree and
R. Saakyan and L. Mortimer and P. Corlett and A. Warry and
A. Gosling and C. Baker and A. Poynter and A. Kacperek and
S. Jolly},
title = {{S}pread-out {B}ragg peak measurements using a compact
quality assurance range calorimeter at the {C}latterbridge
{C}ancer {C}entre.},
journal = {Physics in medicine and biology},
volume = {69},
number = {11},
issn = {0031-9155},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {DKFZ-2024-00865},
pages = {115015},
year = {2024},
abstract = {The superior dose conformity provided by proton therapy
relative to conventional X-ray radiotherapy necessitates
more rigorous Quality Assurance (QA) procedures to ensure
optimal patient safety. Practically however,
time-constraints prevent comprehensive measurements to be
made of the proton range in water: a key parameter in
ensuring accurate treatment delivery.A novel
scintillator-based device for fast, accurate
water-equivalent proton range QA measurements for ocular
proton therapy is presented. Experiments were conducted
using a compact detector prototype, the Quality Assurance
Range Calorimeter (QuARC), at the Clatterbridge Cancer
Centre (CCC) in Wirral, UK for the measurement of pristine
and spread-out Bragg peaks (SOBPs). The QuARC uses a series
of 14 optically-isolated 100 x 100 x 2.85 mm polystyrene
scintillator sheets, read out by a series of photodiodes.
The detector system is housed in a custom 3D-printed
enclosure mounted directly to the nozzle and a numerical
model was used to fit measured depth-light curves and
correct for scintillator light quenching.Measurements of the
pristine 60 MeV proton Bragg curve found the QuARC able to
measure proton ranges accurate to 0.2 mm and reduced QA
measurement times from several minutes down to a few
seconds. A new framework of the quenching model was deployed
to successfully fit depth-light curves of SOBPs with similar
range accuracy.The speed, range accuracy and simplicity of
the QuARC make the device a promising candidate for ocular
proton range QA. Further work to investigate the performance
of SOBP fitting at higher energies/greater depths is
warranted.},
keywords = {plastic scintillator (Other) / proton therapy (Other) /
quality assurance (Other) / spread out Bragg peak (Other)},
cin = {E040},
ddc = {530},
cid = {I:(DE-He78)E040-20160331},
pnm = {315 - Bildgebung und Radioonkologie (POF4-315)},
pid = {G:(DE-HGF)POF4-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:38657625},
doi = {10.1088/1361-6560/ad42fd},
url = {https://inrepo02.dkfz.de/record/289786},
}