brachytherapy source
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2022 ◽  
Vol 30 (1) ◽  
pp. 691-708
Author(s):  
Nor Shazleen Ab Shukor ◽  
Marianie Musarudin ◽  
Reduan Abdullah ◽  
Mohd Zahri Abdul Aziz

This study aims to measure the radial dose function and anisotropy function F(r, θ) of high Dose Rate (HDR) 192Ir source in a fabricated water-equivalent phantom using Gafchromic® EBT3 film and TLD-100H and to compare the results obtained with the MCNP5 calculated values. The phantom was fabricated using Perspex PMMA material. For, the EBT3 films with a required dimension and TLD-100H chips were placed at r=1, 2, 3, 5, and 10 cm from the source. The F(r, θ) measurements were carried out at r=1, 2, 3, 5, and 10 cm with the angle range from 10° to 170°. The result of from EBT3 film and TLD-100H was in good agreement (2.10%±1.99). Compared to MCNP5, the differences are within 0.31% to 11.47% for EBT3 film and 0.08% to 10.58% for TLD-100H. For the F(r, θ), an average deviation with the MCNP5 calculation is 4.94%±2.7. For both and F(r, θ), the effects are prominent at r=10 cm. At this distance, the response of both Gafchromic® EBT3 film and TLD-100H shows less sensitivity as the dose followed the inverse square law. This work demonstrates that Gafchromic® EBT3 film dosimeter and TLD-100H are suitable dosimeters in 192Ir dosimetric measurements at a radial distance of ˂5 cm


Brachytherapy ◽  
2021 ◽  
Author(s):  
Liana Mulet ◽  
Izabella Barreto ◽  
Gil'ad N. Cohen ◽  
Antonio L. Damato ◽  
Thomas Mauceri ◽  
...  

2021 ◽  
pp. 109952
Author(s):  
José T. Silva ◽  
Carla Daruich de Souza ◽  
Lucas Verdi Angelocci ◽  
Wilmmer Alexander Arcos Rosero ◽  
Beatriz Ribeiro Nogueira ◽  
...  

Author(s):  
Elham Safaeipour ◽  
Hosein Poorbaygi ◽  
Iraj Jabbari ◽  
Shahab Sheibani

2021 ◽  
Author(s):  
Emily Simpson-Page ◽  
Lynsey Hamlett ◽  
Dominika Lew ◽  
Holly Stephens ◽  
Rachael Wilks ◽  
...  

Abstract 3D printing in modern radiotherapy provides creative autonomy which can be a valuable tool for use in brachytherapy source calibration. Radiotherapy centres may verify their brachytherapy source strength with a calibrated Farmer chamber. For this purpose, a jig was designed, 3D printed and commissioned for in-air source strength calibration. Measurements on four afterloaders with varied equipment and environments were completed. A full uncertainty budget was developed and measurements with the in-air jig were consistently within 3% of the certificate source strength. By creating a jig that is able to be customised to multiple catheter sizes and cylindrical chamber designs, centres can be provided with the option of independently checking their source strength with ease and for little cost.


Nukleonika ◽  
2021 ◽  
Vol 66 (2) ◽  
pp. 55-60
Author(s):  
Yuan Wang ◽  
Miao Zhang ◽  
Tong Song ◽  
Zhenqi Chang

Abstract A new kind of 125I seeds with a core-shell structure were synthesized by an easy assembling–disassembling coaxial capillaries microfluidic device. The dose distribution of a 125I brachytherapy source fabricated by arranging six 125I seeds collinearly within a cylindrical titanium capsule was simulated by modelling the source in a water phantom using Monte Carlo N-Particle Transport code. The influence of the motion and the core size of the 125I seeds on the dose distribution was also studied in this work.


2021 ◽  
Vol 158 ◽  
pp. S182-S183
Author(s):  
I. Knoll ◽  
L. de Souza ◽  
P. Ramon ◽  
A. Quevedo ◽  
T. Alves Pianoschi Alva ◽  
...  

2021 ◽  
Vol 158 ◽  
pp. S42-S43
Author(s):  
J. Poder ◽  
D. Cutajar ◽  
A. Howie ◽  
M. Petasecca ◽  
M. Lerch ◽  
...  

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