title: LET dependence of the response of a PTW-60019 microDiamond detector in a 62MeV proton beam.
abstract: This study was initiated following conclusions from earlier experimental work, performed in a low-energy carbon ion beam, indicating a significant LET dependence of the response of a PTW-60019 microDiamond detector. The purpose of this paper is to present a comparison between the response of the same PTW-60019 microDiamond detector and an IBA Roos-type ionization chamber as a function of depth in a 62MeV proton beam. Even though proton beams are considered as low linear energy transfer (LET) beams, the LET value increases slightly in the Bragg peak region. Contrary to the observations made in the carbon ion beam, in the 62MeV proton beam good agreement is found between both detectors in both the plateau and the distal edge region. No significant LET dependent response of the PTW-60019 microDiamond detector is observed consistent with other findings for proton beams in the literature, despite this particular detector exhibiting a substantial LET dependence in a carbon ion beam.
authors: Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, B-1200 Brussels, Belgium. Electronic address: severine.rossomme@uclouvain.be.
authors: S
authors: S
authors: Rossomme
authors: Cliniques Universitaires Saint-Luc, Radiotherapy and Oncology Department, B-1200 Brussels, Belgium.
authors: J M
authors: JM
authors: Denis
authors: Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, B-1200 Brussels, Belgium.
authors: K
authors: K
authors: Souris
authors: Cliniques Universitaires Saint-Luc, Radiotherapy and Oncology Department, B-1200 Brussels, Belgium.
authors: A
authors: A
authors: Delor
authors: Cliniques Universitaires Saint-Luc, Radiotherapy and Oncology Department, B-1200 Brussels, Belgium.
authors: F
authors: F
authors: Bartier
authors: Cliniques Universitaires Saint-Luc, Radiotherapy and Oncology Department, B-1200 Brussels, Belgium.
authors: D
authors: D
authors: Dumont
authors: Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, B-1200 Brussels, Belgium; Cliniques Universitaires Saint-Luc, Radiotherapy and Oncology Department, B-1200 Brussels, Belgium.
authors: S
authors: S
authors: Vynckier
authors: EBG MedAustron GmbH, A-2700 Wiener Neustadt, Austria; National Physical Laboratory, Acoustics and Ionising Radiation Division, Teddington TW11 0LW, United Kingdom.
authors: H
authors: H
authors: Palmans
mesh_terms: D000465:Algorithms; D002138:Calibration; D002244:Carbon / Q000737:chemistry; D018130:Diamond; D004867:Equipment Design; D007477:Ions; D018499:Linear Energy Transfer; D011522:Protons; D011874:Radiometry / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results
chemical_list: D007477:Ions; D011522:Protons; D002244:Carbon; D018130:Diamond
keywords: Proton therapy; Relative dosimetry; Synthetic diamond detector