Dose function for a plane infinite thin source at the boundary of two media

Osanov, D.P.; Podsevalov, Yu. N.

doi:10.1007/bf01375780

Cited by 2 publications

(2 citation statements)

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“…Five centimeters of solid water was placed above the source and 5 cm placed behind the film for scatter purposes. The 5 cm thickness is greater than is necessary for a beta emitter with energy !2 MeV and was chosen as a matter of convenience (13,14). In the intraoperative setting, backscatter can be achieved by simply placing wet gauze on the top of the source.…”

Section: Experimental Measurementsmentioning

confidence: 99%

Experimental and theoretical dosimetry of the RIC-100 phosphorus-32 brachytherapy source for implant geometries encountered in the intraoperative setting

Deufel¹,

Courneyea²,

McLemore³

et al. 2015

Brachytherapy

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Section: Experimental Measurementsmentioning

confidence: 99%

Experimental and theoretical dosimetry of the RIC-100 phosphorus-32 brachytherapy source for implant geometries encountered in the intraoperative setting

Deufel¹,

Courneyea²,

McLemore³

et al. 2015

Brachytherapy

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“…sometimes the dose backscatter factor is called the dose enhancement factor and sometimes the dose reduction factor). Only the dose backscatter factor associated with dose enhancement was determined in this study because data for the dose reduction factor are available in the literature in connection with dose estimation for skin contamination (Osanov andPodsevalov 1971, Cross et al 1992).…”

Section: Definition Of the Dose Backscatter Factormentioning

confidence: 99%

Monte Carlo calculations of the dose backscatter factor for monoenergetic electrons

Cho

Reece

1999

Phys. Med. Biol.

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Recently, there has been growing interest in beta emitters for therapeutic uses, especially in connection with so-called endovascular (or intravascular) brachytherapy. Since accurate dose estimation is necessary for the success of such applications, some problems in beta-ray dosimetry need further study. Among these problems, we have investigated the effect of electron backscattering on dose, which has significance not only for accurate dose estimation but also for new source design. In this study, an empirical measure of electron backscattering, known as the dose backscatter factor, was calculated using EGS4 Monte Carlo calculations for monoenergetic electrons and various scattering materials. Electron energies were 0.1, 0.5, 1.0, 2.0 and 3.0 MeV in combination with Al (Z = 13), Ti (Z = 22), Sr (Z = 38), Ag (Z = 47) and Pt (Z = 78) scatterers. The dose backscatter factor ranged from 10% to 60%, depending on electron energy and material, and was found to increase with the atomic number Z by a log(Z + 1) relationship. A method is presented for calculating the beta-ray dose backscatter factors using the results of this study. To demonstrate the efficacy of this method, a dose backscatter factor depth profile for 32P near a water/aluminium interface was calculated and these calculated results were found to generally reproduce the depth profile obtained from direct EGS4 calculations using the 32P spectrum. The data presented in this study can be used to calculate dose backscatter factors for any combination of beta emitter/scatterer whose atomic number ranges from 13 to 78.

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Dose function for a plane infinite thin source at the boundary of two media

Cited by 2 publications

References 1 publication

Experimental and theoretical dosimetry of the RIC-100 phosphorus-32 brachytherapy source for implant geometries encountered in the intraoperative setting

Experimental and theoretical dosimetry of the RIC-100 phosphorus-32 brachytherapy source for implant geometries encountered in the intraoperative setting

Monte Carlo calculations of the dose backscatter factor for monoenergetic electrons

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