{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Frick S"],"funding":["Deutsche Forschungsgemeinschaft","European Union","Eberhard Karls Universität Tübingen"],"pagination":["100561"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10924196"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["29"],"pubmed_abstract":["<h4>Background and purpose</h4>For dosimetry in magnetic resonance (MR) guided radiotherapy, assessing the magnetic field correction factors of air-vented ionization chambers is crucial. Novel MR-optimized chambers reduce MR-imaging artefacts, enhancing their quality assurance utility. This study aimed to characterize two new MR-optimized ionization chambers with sensitive volumes of 0.07 and 0.016 cm<sup>3</sup> regarding magnetic field correction factors and intra-type variation and compare them to their conventional counterparts.<h4>Material and methods</h4>Five chambers of each type were evaluated in a water phantom, using a clinical linear accelerator and an electromagnet, as well as a 1.5 T MR-linac system. The magnetic field correction factor kB→,Q, addressing the change of response"],"journal":["Physics and imaging in radiation oncology"],"pubmed_title":["Experimental characterization of four ionization chamber types in magnetic fields including intra-type variation."],"pmcid":["PMC10924196"],"funding_grant_id":["ZI 736/2-1","19NRM01 MRgRT-DOS"],"pubmed_authors":["Thorwarth D","Kapsch RP","Frick S","Schneider M"],"additional_accession":[]},"is_claimable":false,"name":"Experimental characterization of four ionization chamber types in magnetic fields including intra-type variation.","description":"<h4>Background and purpose</h4>For dosimetry in magnetic resonance (MR) guided radiotherapy, assessing the magnetic field correction factors of air-vented ionization chambers is crucial. Novel MR-optimized chambers reduce MR-imaging artefacts, enhancing their quality assurance utility. This study aimed to characterize two new MR-optimized ionization chambers with sensitive volumes of 0.07 and 0.016 cm<sup>3</sup> regarding magnetic field correction factors and intra-type variation and compare them to their conventional counterparts.<h4>Material and methods</h4>Five chambers of each type were evaluated in a water phantom, using a clinical linear accelerator and an electromagnet, as well as a 1.5 T MR-linac system. The magnetic field correction factor kB→,Q, addressing the change of response","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Jan","modification":"2026-07-15T01:19:23.483Z","creation":"2025-04-06T01:41:02.349Z"},"accession":"S-EPMC10924196","cross_references":{"pubmed":["38463218"],"doi":["10.1016/j.phro.2024.100561"]}}