Dose response of alanine detectors irradiated with carbon ion beams

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Medical Physics

DOI:https://doi.org/10.1118/1.3560459· OSTI ID:22096962

Herrmann, Rochus; Jaekel, Oliver; Palmans, Hugo; Sharpe, Peter; Bassler, Niels ^[1]

---

1. Department of Physics and Astronomy, Aarhus University, 8000 Aarhus (Denmark)

Purpose: The dose response of the alanine detector shows a dependence on particle energy and type when irradiated with ion beams. The purpose of this study is to investigate the response behavior of the alanine detector in clinical carbon ion beams and compare the results to model predictions. Methods: Alanine detectors have been irradiated with carbon ions with an energy range of 89-400 MeV/u. The relative effectiveness of alanine has been measured in this regime. Pristine and spread out Bragg peak depth-dose curves have been measured with alanine dosimeters. The track structure based alanine response model developed by Hansen and Olsen has been implemented in the Monte Carlo code FLUKA and calculations were compared to experimental results. Results: Calculations of the relative effectiveness deviate less than 5% from the measured values for monoenergetic beams. Measured depth-dose curves deviate from predictions in the peak region, most pronounced at the distal edge of the peak. Conclusions: The used model and its implementation show a good overall agreement for quasimonoenergetic measurements. Deviations in depth-dose measurements are mainly attributed to uncertainties of the detector geometry implemented in the Monte Carlo simulations.

• OSTI ID: 22096962
• Journal Information: Medical Physics, Vol. 38, Issue 4; Other Information: (c) 2011 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-2405
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
60 APPLIED LIFE SCIENCES
ALANINES
BRAGG CURVE
CARBON IONS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
DEPTH DOSE DISTRIBUTIONS
DOSEMETERS
DOSIMETRY
ION BEAMS
MEV RANGE 100-1000
MEV RANGE 10-100
MONTE CARLO METHOD
RADIATION DOSES
RADIOTHERAPY
SENSORS