Open AccessMonte Carlo characterization of 169 Yb as a high‐dose‐rate source for brachytherapy application by FLUKA code
Author(s) -
Anjomrouz Marzieh,
Sadeghi Mahdi,
Haddadi Asghar
Publication year - 2013
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1120/jacmp.v14i4.4298
Subject(s) - monte carlo method , brachytherapy , dose rate , medical physics , characterization (materials science) , physics , nuclear engineering , nuclear medicine , mathematics , medicine , engineering , statistics , optics , radiology , radiation therapy
Higher initial dose rate and simplifying HDR room treatment of169 Yb element among other brachytherapy sources has led to investigating its feasibility as high‐dose‐rate seed. In this work, Monte Carlo calculation was performed to obtain dosimetric parameters of169 Yb , Model M42 source at different radial distances according to AAPM TG‐43U1 and HEBD Report about HDR sources in both air vacuum and spherical homogeneous water phantom. The deposited energy resulted by FLUKA as Monte Carlo code using binning estimators around169 Yb source was converted into radial dose rate distribution in polar coordinates surrounding the brachytherapy source. The results indicate a dose rate constant of 1.14 ± 0.04 cGy . h − 1 . U − 1with approximate uncertainty of 0.04%, air kerma strength, 1.082 ± 2.6 E − 06 U . mCi − 1and anisotropy function ranging from 0.386 to 1.00 for radial distances of 0.5–10 cm and polar angles of 0°–180°. Overall, FLUKA dosimetric outputs were benchmarked with those published by Cazeca et al. via MCNP5 as one of validate dosimetry datasets related to169 Yb HDR source. As a result, it seems that FLUKA code can be applicable as a valuable tool to Monte Carlo evaluation of novel HDR brachytherapy sources. PACS number: 87.15.ak