Heterogeneity and scatter effects on Ir-192 brachytherapy dose distribution

Highlights • Monte Carlo simulation and film measurement 0f dose near an Ir-192 source. • We studied the effect different size air cavities and scattering medium on dose. • An air cavity of 7 mm diameter increased the dose by 9% distal to the cavity. • The absence of full scatter reduced the dose by...

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Veröffentlicht in:	Physica medica 2016-10, Vol.32 (10), p.1210-1215
Hauptverfasser:	Osman, Alexander F.I, Maalej, Nabil, Ul-Rahman, Khateeb, Rahman, Wamied Abdel
Format:	Artikel
Sprache:	eng
Schlagworte:	Air Air cavity Anisotropy Biophysical Phenomena Body Size Brachytherapy Brachytherapy - methods Brachytherapy - statistics & numerical data Computer Simulation Dosimetry Film Dosimetry - statistics & numerical data Humans Iridium Radioisotopes - therapeutic use Monte Carlo Monte Carlo Method Phantoms, Imaging Radiology Radiometry - statistics & numerical data Radiotherapy Dosage Scattering, Radiation
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Zusammenfassung:	Highlights • Monte Carlo simulation and film measurement 0f dose near an Ir-192 source. • We studied the effect different size air cavities and scattering medium on dose. • An air cavity of 7 mm diameter increased the dose by 9% distal to the cavity. • The absence of full scatter reduced the dose by 7% at 10 cm from Ir-192 source. • Air cavities and absence of full scatter induce unacceptable dose errors.
ISSN:	1120-1797 1724-191X
DOI:	10.1016/j.ejmp.2016.09.004