Numerical calculation of relative dose rates from spherical 106 Ru beta sources used in ophthalmic brachytherapy
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چکیده
منابع مشابه
Monte Carlo calculation of shielded colpostat effect on rectum received dose in high dose rate brachytherapy with Cobalt-60 sources
Background: In the current study the effect of shielded colpostat on rectum received dose was calculated in cervical brachytherapy using Monte Carlo (MC) method. Materials and Methods: Two 60Co sources of GZP6 brachytherapy unit used for intracavitary treatments were simulated using MCNPX Monte Carlo code. Also the two types of colpostats including shielded and unshielded were simulated inside ...
متن کاملBeta and gamma dose rates from terrestrially distributed sources.
Dose rates in air and at various depths in tissue produced by concentrations of natural isotopes in the ground are calcu lated for both beta and gamma radiation. Calculated gonadal "screening factors" are within k$ of the experimental values reported by the British Medical Research Council*
متن کاملmonte carlo calculation of shielded colpostat effect on rectum received dose in high dose rate brachytherapy with cobalt-60 sources
background: in the current study the effect of shielded colpostat on rectum received dose was calculated in cervical brachytherapy using monte carlo (mc) method. materials and methods: two 60co sources of gzp6 brachytherapy unit used for intracavitary treatments were simulated using mcnpx monte carlo code. also the two types of colpostats including shielded and unshielded were simulated inside ...
متن کاملTraceability to Absorbed-dose-to-water Primary Standards in Dosimetry of Brachytherapy Sources Used for Radiotherapy
− In the current brachytherapy practice, the procedures to determine the absorbed dose imparted to the patient are affected by an uncertainty higher than in radiotherapy with external beams. That could reduce the success of brachytherapy treatments. Most of the uncertainty is due to a lacking metrology: no absorbed-dose primary standards are so far available to assure direct traceability in dos...
متن کاملMaterial-specific Conversion Factors for Different Solid Phantoms Used in the Dosimetry of Different Brachytherapy Sources
Introduction Based on Task Group No. 43 (TG-43U1) recommendations, water phantom is proposed as a reference phantom for the dosimetry of brachytherapy sources. The experimental determination of TG-43 parameters is usually performed in water-equivalent solid phantoms. The purpose of this study was to determine the conversion factors for equalizing solid phantoms to water. Materials and Methods T...
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ژورنال
عنوان ژورنال: Results in Physics
سال: 2015
ISSN: 2211-3797
DOI: 10.1016/j.rinp.2015.02.006