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Development of a high-precision xyz-measuring table for the determination of the 3D dose rate distributions of brachytherapy sources.

Authors :
Eichmann, M.
Krause, T.
Flühs, D.
Spaan, B.
Source :
Physics in Medicine & Biology. 11/21/2012, Vol. 57 Issue 22, p421-429. 9p.
Publication Year :
2012

Abstract

An xyz-measuring table with a modular design has been developed for the determination of the individual 3D dose rate distributions of different brachytherapy sources requiring a high spatial resolution and reproducibility. The instrumental setup consists of a plastic scintillator detector system and the xyz-measuring table for guiding the detector across the radioactive sources. For this purpose, a micro positioning system with piezo inertial drives is chosen, providing a step width of 450 nm. To ensure a high reproducibility and accuracy better than 1 μm, an exposed linear encoder controls the positioning. The successful operation of the xyz-measuring table is exemplarily shown by measurements of dose profiles of two brachytherapy sources, an ophthalmic plaque and a radioactive seed. The setup allows a fully automated quality assurance of ophthalmic plaques and radioactive seeds under clinical conditions and can be extended to other (brachytherapy) sources of similar dimensions [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00319155
Volume :
57
Issue :
22
Database :
Academic Search Index
Journal :
Physics in Medicine & Biology
Publication Type :
Academic Journal
Accession number :
83407880
Full Text :
https://doi.org/10.1088/0031-9155/57/22/N421