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Monte Carlo characterization of an ytterbium‐169 high dose rate brachytherapy source with analysis of statistical uncertainty
Author(s) -
Medich David C.,
Tries Mark A.,
Munro John J.
Publication year - 2006
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2147767
Subject(s) - monte carlo method , brachytherapy , ytterbium , photon , dosimetry , physics , computational physics , medical physics , nuclear medicine , optics , mathematics , statistics , radiation therapy , medicine , laser , radiology
An ytterbium‐169 high dose rate brachytherapy source, distinguished by an intensity‐weighted average photon energy of 92.7 keV and a 32.015 ± 0.009 day half‐life, is characterized in terms of the updated AAPM Task Group Report No. 43 specifications using the MCNP5 Monte Carlo computer code. In accordance with these specifications, the investigation included Monte Carlo simulations both in water and air with the in‐air photon spectrum filtered to remove low‐energy photons below 10 keV . TG‐43 dosimetric data including S K ,D ̇ ( r , θ ) , Λ ,g L ( r ) , F ( r , θ ) ,φ an ( r ) , andφ ¯ anwere calculated and statistical uncertainties in these parameters were derived and calculated in the appendix.