Open AccessDosimetric evaluation of newly developed well-type ionization chamber for use in the calibration of brachytherapy sources
Author(s) -
S Sathiyan,
Henry Finlay Godson,
Retna Ponmalar,
M Ravikumar,
James Mazarello
Publication year - 2016
Publication title -
journal of medical physics/journal of medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.292
H-Index - 24
eISSN - 1998-3913
pISSN - 0971-6203
DOI - 10.4103/0971-6203.195187
Subject(s) - ionization chamber , kerma , brachytherapy , calibration , ionization , materials science , dosimetry , nuclear medicine , ion , chemistry , physics , medicine , radiation therapy , radiology , organic chemistry , quantum mechanics
The well-type ionization chamber has been designed for convenient use in brachytherapy source strength calibration. The chamber has a volume of 240 cm 3 , weight of 2.5 kg, and is open to atmospheric conditions. The well-type ionization chamber dosimetric characteristics such as leakage current, stability, scattering effect, ion collection efficiency, and nominal response with energy were studied. The evaluated dosimetric characteristics of well-type ionization chamber were compared with two other commercially available well-type ionization chambers. The study shows that the newly developed well-type ionization chamber is reliable for air-kerma strength calibration. The results obtained confirm that this chamber can be used for the calibrations of high-dose rate brachytherapy sources.