NDLI: A semi-analytic approach to determine dose rate constant of brachytherapy sources in compliance with AAPM TG 60 formalism

Content Provider	Springer Nature Link
Author	Selvam, T. Palani Nagarajan, P. S. Rajan, K. N. Govinda Sethulakshmi, P. Bhatt, B. C.
Copyright Year	2003
Abstract	Values of dose rate constant (DRC) in compliance with AAPM TG 60 formalism recommended for intravascular brachytherapy (IVBT) were calculated for different point isotropic mono-energetic photon sources in the energy range E=20–1000 keV using a semi-analytic model. Based on these DRC values, DRC of some existing models of$^{192}$Ir and$^{125}$I brachytherapy sources were then calculated using (1) bare energy spectra and (2) a single energy parameter which represents mean energy (photon number weighted or air-kerma weighted) for bare and actual sources or the most probable energy of the spectra (energy line with the highest probability of emission) of the investigated sources ($^{192}$Ir and$^{125}$I). Applicability of the semi-analytic approach was examined by also computing the values of DRC of the investigated sources using MCNP Monte Carlo simulation code (Version 3.1) that involved modeling of the sources accurately. A comparison of values of DRC resulting from MCNP calculations with those resulting from the semi-analytic approach showed that for$^{192}$Ir sources the agreement was within 0.40 % and for$^{125}$I sources it was within 2.3 %.
Starting Page	179
Ending Page	184
Page Count	6
File Format	PDF
ISSN	01589938
Journal	Australasian Physics & Engineering Sciences in Medicine
Volume Number	26
Issue Number	4
e-ISSN	18795447
Language	English
Publisher	Springer Netherlands
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	dose rate constant semi-analytic approach brachytherapy Monte Carlo method MCNP Biomedicine general Biophysics and Biological Physics Medical and Radiation Physics Biomedical Engineering Theoretical, Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Physics and Astronomy Biophysics Biomedical Engineering

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