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@ARTICLE{Glowa:351423,
author = {Glowa, Christin and Saager, Maria and Hintz, Lisa and
Euler-Lange, Rosemarie and Peschke, Peter and Brons, Stephan
and Scholz, Michael and Mein, Stewart and Mairani, Andrea
and Karger, Christian P.},
title = {{R}elative biological effectiveness of oxygen ion beams in
the rat spinal cord: {D}ependence on linear energy transfer
and dose and comparison with model predictions},
journal = {Physics $\&$ Imaging in Radiation Oncology},
volume = {30},
issn = {2405-6316},
address = {Amsterdam [u. a.]},
publisher = {Elsevier Science},
reportid = {GSI-2024-00630},
pages = {100581},
year = {2024},
note = {This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).},
abstract = {Ion beams exhibit an increased relative biological
effectiveness (RBE) with respect to photons. This study
determined the RBE of oxygen ion beams as a function of
linear energy transfer (LET) and dose in the rat spinal
cord.The spinal cord of rats was irradiated at four
different positions of a 6 cm spread-out Bragg-peak (LET:
26, 66, 98 and 141 keV/µm) using increasing levels of
single and split oxygen ion doses. Dose-response curves were
established for the endpoint paresis grade II and based on
ED50 (dose at 50 $\%$ effect probability), the RBE was
determined and compared to model predictions.When LET
increased from 26 to 98 keV/µm, ED50 decreased from 17.2 ±
0.3 Gy to 13.5 ± 0.4 Gy for single and from 21.7 ± 0.4 Gy
to 15.5 ± 0.5 Gy for split doses, however, at 141 keV/µm,
ED50 rose again to 15.8 ± 0.4 Gy and 17.2 ± 0.4 Gy,
respectively. As a result, the RBE increased from 1.43 ±
0.05 to 1.82 ± 0.08 (single dose) and from 1.58 ± 0.04 to
2.21 ± 0.08 (split dose), respectively, before declining
again to 1.56 ± 0.06 for single and 1.99 ± 0.06 for split
doses at the highest LET. Deviations from RBE-predictions
were model-dependent.This study established first RBE data
for the late reacting central nervous system after single
and split doses of oxygen ions. The data was used to
validate the RBE-dependence on LET and dose of three
RBE-models. This study extends the existing data base for
protons, helium and carbon ions and provides important
information for future patient treatments with oxygen ions.},
keywords = {Late normal tissue effects (Other) / Linear energy transfer
(LET) (Other) / Local effect model (LEM) (Other) / Modified
microdosimetric kinetic model (mMKM) (Other) / Myelopathy
(Other) / Oxygen ion radiotherapy (Other) / Rat spinal cord
(Other) / Relative biological effectiveness (RBE) (Other)},
cin = {BIO / BIO@FAIR},
ddc = {610},
cid = {I:(DE-Ds200)BIO-20160831OR354 / I:(DE-Ds200)Coll-FAIR-BIO},
pnm = {633 - Life Sciences – Building Blocks of Life: Structure
and Function (POF4-633) / SUC-GSI-Heidelberg - Strategic
university cooperation GSI-U Heidelberg (SUC-GSI-HE)},
pid = {G:(DE-HGF)POF4-633 / G:(DE-Ds200)SUC-GSI-HE},
experiment = {$EXP:(DE-Ds200)no_experiment-20200803$},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.phro.2024.100581},
url = {https://repository.gsi.de/record/351423},
}