| Zugriffsnummer | 50322 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Dose distributions of the INTRABEAM electronic brachytherapy system measured with traceable detectors |
| Autor(in); Institution |
Grote, Friederike; 6.3, Strahlenschutzdosimetrie, PTB-Braunschweig
Kasper, Angelika; 6.3, Strahlenschutzdosimetrie, PTB-Braunschweig
|
| Quelle/Jahr | Journal of Instrumentation: 18 (2023), 1 - 25 |
| Artikelnummer | P07049 |
| Availability | [online only] |
| ISSN | 1748-0221 (online) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | Instrumentation for gamma-electron therapy ; Intra-operative probes ; Radiotherapy concepts |
| Zusammenfassung | In this work, a methodology to determine the absorbed dose rate to water distribution from electronic brachytherapy (eBT) units is suggested. It involves measuring directly in a full scatter water tank with small active detectors whose energy response at low X-ray photon energies have been previously characterized. Dose distributions of an INTRABEAM PRS 500 system in two configurations-bare needle and with the spherical applicator of 40mm diameter-were measured in water using the Exradin A26 ionization chamber and the PTW60019 microDiamond detector. The continuous energy response of these two detectors in terms of air kerma from 5 keV to 70 keV (eBT energy range) was available from a previous calibration at several X-ray radiation qualities. Here, it is converted to the response in absorbed dose to water using correction factors obtained with Monte Carlo (MC) particle transport simulations. The detectors were modelled using the MCNP code. The air kerma calibration factors were simulated and compared with measurements to refine and validate the models. A series of simulations of the experimental arrangement of the INTRABEAM and the detector were carried out for determining the system specific detector correction factors. These values are distance-dependent due to the steep dose gradient and the remarkable spectral changes around the eBT source in water. The dose rate with distance from the source, the radial and the polar distributions of the INTRABEAM are reported and compared with the manufacturers supplied data. This work is an effort to provide traceability for detectors and measurement procedures for the determination of 3D dose distributions as part of the European joint research project "Primary standards and traceable measurement methods for X-ray emitting electronic brachytherapy devices" (18NRM02 PRISM-eBT). |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Ionisierende Strahlung |
| Forschungsprojekt | 18NRM02: PRISM-eBT: Primary standards and traceable measurement methods for X-ray emitting electronic brachytherapy devices |
| Förderinformationen (1) |
Förderername: European Commission (EC)
Förderer ID: 0000 0001 2242 8989 Förderer ID Typ: ISNI Förderprogramm: EMPIR 2018 Normative Titel der Förderung: 18NRM02: PRISM-eBT: Primary standards and traceable measurement methods for X-ray emitting electronic brachytherapy devices Förderungsnummer: 18NRM02 |
Zitierung
Garcia Yip, F., Solc, J., Behrens, R., Schneider, T., Grote, F., & Kasper, A. (2023). Dose distributions of the INTRABEAM electronic brachytherapy system measured with traceable detectors. Journal of Instrumentation, 18, 1–25. https://doi.org/10.1088/1748-0221/18/07/P07049