Performance evaluation of MRI-based PAGAT polymer gel dosimeter in an inhomogeneous phantom using EGSnrc code on a Co-60 machine

Relative isodose curves were obtained using PAGAT gel dosimeter on homogeneous and inhomogeneous phantoms. Distance-to-agreement (DTA) was calculated between simulated and measured values for both the homogeneous and inhomogeneous phantoms. All DTAs except one passed the acceptance criterion (±5 dos...

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Bibliographic Details
Published in:Applied radiation and isotopes 2009, Vol.67 (1), p.186-191
Main Authors: Pourfallah, Tayyeb Allahverdi, Allahverdi, Mahmoud, Alam, Nader Riahi, Ay, Mohammad-Reza, Zahmatkesh, Mohammad-Hasan, Ibbott, Geoffrey S.
Format: Article
Language:English
Subjects:
Cobalt Radioisotopes
EGSnrc code
Film Dosimetry
Gel dosimetry
Gels
Inhomogeneity
Monte Carlo Method
PAGAT
Phantoms, Imaging
Polymers
Radiation Dosage
Radiometry - methods
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Summary:Relative isodose curves were obtained using PAGAT gel dosimeter on homogeneous and inhomogeneous phantoms. Distance-to-agreement (DTA) was calculated between simulated and measured values for both the homogeneous and inhomogeneous phantoms. All DTAs except one passed the acceptance criterion (±5 dose variation for selected isodose levels). Results of this study also showed the ability of the Monte Carlo modeling to provide accurate dosimetry, and revealed that the dose response of PAGAT polymer gel is dependent on the method of fabrication.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2008.09.006