TY  - JOUR
AU  - Marot, Mathieu
AU  - Jäger, Fabian
AU  - Greilich, Klaus-Steffen
AU  - Karger, Christian P
AU  - Jaekel, Oliver
AU  - Burigo, Lucas Norberto
TI  - Monte Carlo simulation for proton dosimetry in magnetic fields: Fano test and magnetic field correction factors kBfor Farmer-type ionization chambers.
JO  - Physics in medicine and biology
VL  - 68
SN  - 0031-9155
CY  - Bristol
PB  - IOP Publ.
M1  - DKFZ-2023-01641
SP  - 175037
PY  - 2023
N1  - #EA:E040#LA:E040# / Phys. Med. Biol. 68 (2023) 175037
AB  - In this contribution we present a special Fano test for charged particles in presence of magnetic fields in the MC code TOPAS, as well as the determination of magnetic field correction factors kBfor Farmer-type ionization chambers using proton beams.</td><td width="150">
AB  - #xD;</td><td width="150">
AB  - #xD;Approach: Customized C++ extensions for TOPAS were implemented to model the special Fano tests in presence of magnetic fields for electrons and protons. The Geant4-specific transport parameters,DRoverRandfinalRange, were investigated to optimize passing rate and computation time. The kBwas determined for the Farmer-type PTW 30013 ionization chamber, and 5 custom built ionization chambers with same geometry but varying inner radius, testing magnetic flux density ranging from 0 to 1.0 T and two proton beam energies of 157.43 and 221.05 MeV.</td><td width="150">
AB  - #xD;</td><td width="150">
AB  - #xD;Main results: Using the investigated parameters, TOPAS passed the Fano test within 0.39±0.15
KW  - MR-guided proton therapy (Other)
KW  - TOPAS (Other)
KW  - dosimetry (Other)
KW  - magnetic field (Other)
KW  - magnetic field correction factor (Other)
LB  - PUB:(DE-HGF)16
C6  - pmid:37567226
DO  - DOI:10.1088/1361-6560/acefa1
UR  - https://inrepo02.dkfz.de/record/278407
ER  -