Air kerma strength characterization of a GZP6 Cobalt-60 brachytherapy source

Abstract

The calculated and measured AKS values are in good agreement. Calculated-TPS and measured-TPS AKS values are also in agreement within the uncertainties related to our calculation, measurements and those certified by the GZP6 manufacturer. Considering the uncertainties, the TPS value for AKS is validated by our calculations and measurements, however, it is incorporated with a large uncertainty.

Dose distribution verification for GYN brachytherapy using EBT Gafchromic film and TG-43 calculation

“…7 The GZP6 treatment planning system is able to produce dose distributions in the transverse and longitudinal planes. It calculates dose using the superposition dose calculation technique.…”

“…8 TG-43 recommended dosimetric characteristics of the sources in this system have been evaluated by several different investigators. [7][8][9] In this study channels 3 and 4 of GZP6 HDR system were utilized to deliver 1.5 Gy dose to 0.5 cm distance from the lateral surface of ovoids within 4.62 min. Each of the channels 3 and 4 contains one stationary active pellet (they are nearly identical in their source strength and geometry) and they can be used in the ovoids.…”

“…For simulation, MCNP4C Code is used based on the technique that was published by Toosi et al Self-absorption of the source core and its capsule were taken into account at their study. 7 For this part of our work, cylindrical rings with 0.5 cm thickness and 0.5 cm length were simulated in the 1-25 cm transverse distance from the source center, in 1 cm increments. In ring cells, the F6 tally was used to calculate air kerma in unit of MeV/g per photon in the ring cells.…”

Effect of the bone heterogeneity on the dose prescription in orthovoltage radiotherapy: A Monte Carlo study

“…1 were calculated using the DOSXYZnrc. 11,12 The voxel size used in the simulation was 0.1 mm × 0.1 mm × 0.1 mm, which corresponds to the x, y and z-axis. Under this calculation set up, the surface dose in this study was defined at the depth of 0.05 mm.…”

Dosimetric study of GZP6 60Co high dose rate brachytherapy source

“…using the MC method and GZP6 TPS. Toossi et al . estimated the air kerma strength of GZP6 60 Co source number 3 by Monte Carlo simulation and in‐air measurements.…”