Dosimetric perturbations at high-Z interfaces with high dose rate (192)Ir source.

  title={Dosimetric perturbations at high-Z interfaces with high dose rate (192)Ir source.},
  author={Hualin Zhang and Indra J. Das},
  journal={Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics},
  volume={30 7},
PURPOSE To investigate dose perturbations created by high-atomic number (Z) materials in high dose rate (HDR) Iridium-192 ((192)Ir) treatment region. METHODS AND MATERIALS A specially designed parallel plate ion chamber with 5 μm thick window was used to measure the dose rates from (192)Ir source downstream of the high-Z materials. A Monte Carlo (MC) code was employed to calculate the dose rates in both upstream and downstream of the high-Z interfaces at distances ranging from 0.01 to 2 mm… CONTINUE READING
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