Reference dosimetry in the presence of magnetic fields: conditions to validate Monte Carlo simulations

With the advent of MRI-guided radiotherapy, reference dosimetry must be thoroughly addressed to account for the effects of the magnetic field on absorbed dose to water and on detector dose response. While Monte Carlo plays an essential role in reference dosimetry, it is also crucial for determining...

Full description

Saved in:
Bibliographic Details
Published in:Physics in medicine & biology 2015-09, Vol.60 (17), p.6639-6654
Main Authors: Bouchard, Hugo, de Pooter, Jacco, Bielajew, Alex, Duane, Simon
Format: Article
Language:English
Subjects:
Algorithms
Fano cavity test
Fano theorem
ionisation chamber response
Magnetic Fields
Magnetic Resonance Imaging
Monte Carlo Method
Monte Carlo radiation transport
MRI-guided radiotherapy
Radiometry - standards
Radiotherapy, Image-Guided
reference dosimetry
Reference Values
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With the advent of MRI-guided radiotherapy, reference dosimetry must be thoroughly addressed to account for the effects of the magnetic field on absorbed dose to water and on detector dose response. While Monte Carlo plays an essential role in reference dosimetry, it is also crucial for determining quality correction factors in these new conditions. The Fano cavity test is recognized as fundamental to validate Monte Carlo transport algorithms. In the presence of magnetic fields, it is necessary to define special conditions under which such a test can be performed. The present theoretical study proposes two conditions in which the validity of Fano's theorem is demonstrated in the presence of a magnetic field and the analytic expression of energy deposition is verified. It is concluded that the proposed conditions form a valid basis for two types of Fano cavity tests in the presence of a magnetic field.
ISSN:0031-9155
1361-6560
DOI:10.1088/0031-9155/60/17/6639