| Zugriffsnummer | 34353 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Measurement of spatial response functions of dosimetric detectors |
| Autor(in); Institution |
Ketelhut, Steffen; 6.2, Dosimetrie für Strahlentherapie und Röntgendiagnostik, PTB-Braunschweig
Kapsch, Ralf-Peter; 6.2, Dosimetrie für Strahlentherapie und Röntgendiagnostik, PTB-Braunschweig
|
| Quelle/Jahr | Physics in Medicine and Biology: 60 (2015), 16, 6177 - 6194 |
| ISSN | 0031-9155 (PRINT) ; 1361-6560 (ONLINE) |
| DOI | |
| Verlag | Bristol: IOP |
| Klassifikationscode | PACS: 87.53.Bn ; PACS: 87.55.K- ; PACS: 87.55.Gh Simulation |
| Freie Schlagworte | detector response function ; ionization chamber ; photon field dosimetry ; electron field dosimetry ; detector size effect |
| Zusammenfassung | The spatial response functions in lateral and longitudinal directions of four cylindrical ionization chambers of the types NE 2561, FC65-G, PTW 31010, and PTW 31016, two plane-parallel ionization chambers of the types PTW 34001 and PTW 34045, and one diode of the type PTW 60012 were measured in air in high-energy photon beams with nominal accelerating voltages of 4 MV, 8 MV, and 25 MV, and electron beams with nominal energies of 6 MeV, 15 MeV, and 20 MeV. The measurements were performed by moving the detectors in small steps across the edge of a lead block for the photon beams, and across a thin slit between two lead blocks for the electron beams. Monte Carlo calculations were used to analyze the measurements and to identify contributions of the different parts of the chamber. Finally, a simple empirical model for describing the spatial response functions is established. |
