Investigation of dose distribution of TheraSeed 200 103Pd brachytherapy seed on coaxial cylindrical phantom shells using Monte Carlo simulation

Abstract

It seems that geometrical specification of a seed is markedly effective on dose distribution. Differences between doses of two radioactive materials decrease rapidly beyond the seed borders. Consideration of this study can be applied for other seeds that have multiple radiation emitters to research the effects of their geometrical specification on dose distributions.

Cluster pattern analysis of energy deposition sites for the brachytherapy sources103Pd,125I,192Ir,137Cs, and60Co

“…We used the spectra for 125 I Nucletron SelectSeed 130.002 and 192 Ir microSelectron-HDR v1 from the Carleton Laboratory for Radiotherapy Physics database (www.physics.carleton.ca/clrp/seed_database) that is based on the work by Taylor and Rogers (2008). For the 103 Pd TheraSeed 200 and the 137 Cs seed, the primary photon spectra were obtained through a PENELOPE MC simulation in which the geometry of the seeds was set according to the diagrams from the work of Camgoz and Kumru (2011) and Thomason et al (1991), respectively. The active source inside the metal casings emitted photons isotropically according to the respective decay schemes taken from the Nudat 2 database (www.nndc.bnl.gov/dudat2/) from the National Nuclear Data Center of the Brookhaven National Laboratory.…”