Phantom Positioning Variation in the Gamma Knife® Perfexion Dosimetry

The use of small volume ionization chamber has become required for the dosimetry of equipments that use small radiation fields such as the Gamma Knife® Perfexion (GKP) unit. In this work, a pinpoint ionization chamber was inserted into the dosimetry phantom and measurements were performed with the p...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-07, Vol.733 (1), p.12098
Main Authors: Costa, N A, Potiens, M P A, Saraiva, C W C
Format: Article
Language:English
Subjects:
Dosimeters
Dosimetry
Ionization chambers
Physics
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Description
Summary:The use of small volume ionization chamber has become required for the dosimetry of equipments that use small radiation fields such as the Gamma Knife® Perfexion (GKP) unit. In this work, a pinpoint ionization chamber was inserted into the dosimetry phantom and measurements were performed with the phantom in different positions, in order to verify if the change in the phantom positioning affects the dosimetry of the GKP. Four different phantom positions were performed. The variation in the result is within the range allowed for the dosimetry of a GKP equipment.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/733/1/012098