title: Experimental determination of the photon-energy dependent dose-to-water response of TLD600 and TLD700 (LiF:Mg,Ti) thermoluminescence detectors.
abstract: The aim of this study has been the experimental determination of the energy dependent dose-to-water response of TLD600 and TLD700 thermoluminescent detectors (Harshaw) in X-ray beams with mean photon energies from about 20 to 200keV in comparison with60Co gamma rays and 6MV X-rays. Experiments were carried out in collaboration with the German secondary standard laboratory PTW Freiburg. The energy dependent relative responses of TLD600 and TLD700 thermoluminescence detectors were determined at radiation qualities between 30kVpand 280kVp. The overall uncertainty of the measured values was characterized by standard deviations varying from 1.2 to 3%. The present results agree with previous studies on the energy dependent dose-to-water response of TLD100. As an application example, the results were used to measure doses associated with X-ray imaging in image-guided radiotherapy.
authors.affiliation: Department of Radiation Therapy, Vivantes Clinic Neukoelln, Berlin, Germany; Medical Physics in Radiation Therapy, German Cancer Research Center, Heidelberg, Germany. Electronic address: andrea.schwahofer@vivantes.de.
authors.forename: Andrea
authors.initials: A
authors.lastname: Schwahofer
authors.affiliation: Department of Radiation Therapy, Ludwig-Maximilians-University (LMU), Munich, Germany.
authors.forename: Harald
authors.initials: H
authors.lastname: Feist
authors.affiliation: PTW Freiburg, Calibration Laboratory, Freiburg, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Georg
authors.affiliation: Medical Physics in Radiation Therapy, German Cancer Research Center, Heidelberg, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Häring
authors.affiliation: Medical Physics in Radiation Therapy, German Cancer Research Center, Heidelberg, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schlegel
mesh_terms: D017785:Photons; D011829:Radiation Dosage; D061089:Radiotherapy, Image-Guided; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation*; D014867:Water; D014965:X-Rays
chemical_list: D014867:Water
keywords: Energieabhängigkeit; Energy dependence; TL detectors; TL-Detektoren; TLD; TLD600; TLD700; Thermoluminescence dosimetry; Thermolumineszenzdosimetrie