Dosimetry Fibers Germanium Optical fibers Photons Radiation therapy dosimetry Radiotherapy Silica Thermoluminescence Characterization Clinical radiotherapy Confidence levels Core diameters Dosimeters Dosimetric systems Electron energies Electron energy levels Ge-doped silica Glass Healthy tissues Irradiation Linear response Oncology Photon irradiation Radiation Radiation dosimeters Reproducibilities Research centres Standard error of the means Thermoluminescence detectors