| Zugriffsnummer | 28552 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | The PTB Primary Standard for the absorbed-dose to water for I-125 interstitial brachytherapy sources |
| Autor(in); Institution |
Schneider, Thorsten; 6.2, Dosimetrie für Strahlentherapie und Röntgendiagnostik, PTB-Braunschweig
|
| Quelle/Jahr | Metrologia: 49 (2012), 5, S198 - S202 |
| ISSN | 0026-1394 |
| DOI | |
| URL | |
| Verlag | Bristol: IOP |
| Konferenzangaben | Conference on Advanced Metrology for Cancer Therapy (CAMCT), Braunschweig, 29, November - 01, December, 2011, Germany |
| Klassifikationscode | PACS: 87.53.Jw ; PACS: 87.53.Bn ; PACS: 87.56.Da ; PACS: 87.55.K- ; PACS: 87.19.X- |
| Freie Schlagworte | absorbed dose to water ; extrapolation chamber ; low-energy photon ; phantom |
| Zusammenfassung | The German national metrology institute (PTB) developed a primary standard in terms of absorbed-dose to water Dw for low-energy interstitial brachytherapy sources, which is based on an extrapolation chamber in a phantom of water-equivalent material. The method to determine Dw from extrapolation chamber measurements had been newly developed and is already described in literature. With the chamber the absorbed-dose in 30 cm distance from the source is measured and the quantity is converted into the desired quantity, the absorbed-dose to water measured in 1 cm distance perpendicular to the source axis. In this publication a synthesis of the work done within the EMRP-Project: "TP2.JRP6: INCREASING CANCER TREATMENT EFFICACY USING 3D BRACHYTHERAPY" is given and the final results and the final uncertainty budget are presented. Furthermore an experimentally determined dose-rate constant for this seed type (BEBIG Symmetra I25.S16) is given based on the measurement of four different instances. |
