Microdosimetry for a carbon ion beam using track-etched detectors
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25862534
DOI
10.1093/rpd/ncv131
PII: ncv131
Knihovny.cz E-resources
- MeSH
- Particle Accelerators instrumentation MeSH
- Radiation Dosage MeSH
- Equipment Design MeSH
- Electrons MeSH
- Calibration MeSH
- Linear Energy Transfer radiation effects MeSH
- Microtechnology methods MeSH
- Computer Simulation MeSH
- Polymethyl Methacrylate chemistry MeSH
- Radiometry instrumentation MeSH
- Heavy Ions * MeSH
- Carbon * MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Polymethyl Methacrylate MeSH
- Carbon * MeSH
Track-etched detectors (TED) have been used as linear energy transfer (LET) spectrometers in heavy ion beams for many years. LET spectra and depth-dose distribution of a carbon ion beam were measured behind polymethylmethacrylate degraders at Heavy Ion Medical Accelerator in Chiba, Japan. The measurements were performed along monoenergetic beam with energy 290 MeV u(-1) in different positions: (1) at beam extraction area, (2) at beginning, (3) maximum and (4) behind the Bragg peak region (0, 117, 147 and 151 mm of water-equivalent depth, respectively). The LET spectra inside and outside of the primary ion beam have been evaluated. TED record only heavy charged particles with LET above 8-10 keV µm(-1), while electrons and ions with lower LET are not detected. The Geant4 simulation toolkit version 4.9.6.P01 has been used to estimate the contribution of non-detected particles to absorbed dose. Presented results demonstrate the applicability of TED for microdosimetry measurements in therapeutic carbon ion beams.
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