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This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). License (http://creativecommons.org/licenses/by-nc-sa/4.0/)
Design of phantom used in presented study. A) Phantom with catheters for 192Ir source; B) Phantom with inserted film holder; C) Phantom with ionization chamber holder