Abstract
Under given clinical circumstances the air kerma rate produced by brachytherapy sources at photon energies between 150 and 600 keV must be measured with teletherapy-type ionisation chambers positioned in air at some distance from the source. According to the presented experiments and calculations the chambers should be used with a) the wall thickness adaption caps provided for Co-60 gamma radiation together with an air kerma calibration factor interpolated for the photon spectrum of the specified nuclide, b) the shape- and distance-dependent Kondo/Randolph correction factors which permit source to chamber distances as low as twice the chamber diameter. Ionization chamber signals of sufficient resolution (100 digits) have been obtained with activities of about 100 MBq (3 mCi) using a 30 cm3 cylindrical chamber.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
