ArticleMedical physics2021
MR-guided proton therapy: Impact of magnetic fields on the detector response.
Article in Medical physics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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Who cites it
8 citing papers in PubMed, 20 citations in OpenAlex.
- Feasibility of ultra-low-field MRI in an ion beam treatment room for online MR-guided particle therapy.Physics and imaging in radiation oncology · 2026Article
- Characterization of a Commercial Ionization Chamber Array With Scanned Proton Beams for Applications in MRI-Guided Proton Therapy.Medical physics · 2025Article
- Current status and upcoming developments for online adaptive proton therapy enabling a closed feedback loop for near real-time adaptation.Frontiers in oncology · 2025Review
- Dosimetry in MRgPT: Impact of magnetic fields on TLD dose response during proton irradiation.Medical physics · 2025Article
- Feasibility study of 4D-online monitoring of density gradients induced by lung cancer treatment using carbon ions.Frontiers in oncology · 2025Article
- A review of the clinical introduction of 4D particle therapy research concepts.Physics and imaging in radiation oncology · 2024Review
- An external perpendicular magnetic field does not influence survival and DNA damage after proton and carbon ion irradiation in human cancer cells.Zeitschrift fur medizinische Physik · 2022Article
- Management of Motion and Anatomical Variations in Charged Particle Therapy: Past, Present, and Into the Future.Frontiers in oncology · 2022Review
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 3 countries.
Funding
Abstract
purposeTo investigate the response of detectors for proton dosimetry in the presence of magnetic fields. MATERIAL AND
methodsFour ionization chambers (ICs), two thimble-type and two plane-parallel-type, and a diamond detector were investigated. All detectors were irradiated with homogeneous single-energy-layer fields, using 252.7 MeV proton beams. A Farmer IC was additionally irradiated in the same geometrical configuration, but with a lower nominal energy of 97.4 MeV. The beams were subjected to magnetic field strengths of 0, 0.25, 0.5, 0.75, and 1 T produced by a research dipole magnet placed at the room's isocenter. Detectors were positioned at 2 cm water equivalent depth, with their stem perpendicular to both the magnetic field lines and the proton beam's central axis, in the direction of the Lorentz force. Normality and two sample statistical Student's t tests were performed to assess the influence of the magnetic field on the detectors' responses.
resultsFor all detectors, a small but significant magnetic field-dependent change of their response was found. Observed differences compared to the no magnetic field case ranged from +0.5% to -0.7%. The magnetic field dependence was found to be nonlinear and highest between 0.25 and 0.5 T for 252.7 MeV proton beams. A different variation of the Farmer chamber response with magnetic field strength was observed for irradiations using lower energy (97.4 MeV) protons. The largest magnetic field effects were observed for plane-parallel ionization chambers.
conclusionSmall magnetic field-dependent changes in the detector response were identified, which should be corrected for dosimetric applications.
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Registered trials
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