Technical note: Vendor-agnostic water phantom for 3D dosimetry of complex fields in particle therapy.
J Appl Clin Med Phys
; 21(10): 227-232, 2020 Oct.
Article
em En
| MEDLINE
| ID: mdl-32991056
ABSTRACT
PURPOSE:
Three-dimensional (3D) dosimetry is a necessity to validate patient-specific treatment plans in particle therapy as well as to facilitate the development of novel treatment modalities. Therefore, a vendor-agnostic water phantom was developed and verified to measure high resolution 3D dose distributions.METHODS:
The system was experimentally validated at the Marburger Ionenstrahl-Therapiezentrum using two ionization chamber array detectors (PTW Octavius 1500XDR and 1000P) with 150.68 MeV proton and 285.35 MeV/u 12 C beams. The dose distribution of several monoenergetic and complex scanned fields were measured with different step sizes to assess the reproducibility, absolute positioning accuracy, and general performance of the system.RESULTS:
The developed system was successfully validated and used to automatically measure high resolution 3D dose distributions. The reproducibility in depth was better than ±25 micron. The roll and tilt uncertainty of the detector was estimated to be smaller than ±3 mrad.CONCLUSIONS:
The presented system performed fully automated, high resolution 3D dosimetry, suitable for the validation of complex radiation fields in particle therapy. The measurement quality is comparable to commercially available systems.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Radiometria
/
Água
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article