title: Dosimetric evaluation of newly developed well-type ionization chamber for use in the calibration of brachytherapy sources.
abstract: The well-type ionization chamber has been designed for convenient use in brachytherapy source strength calibration. The chamber has a volume of 240 cm3, 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.
authors.affiliation: Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India.
authors.forename: Sathiyan
authors.initials: S
authors.lastname: Saminathan
authors.affiliation: Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India.
authors.forename: Henry Finlay
authors.initials: HF
authors.lastname: Godson
authors.affiliation: Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India.
authors.forename: Retna
authors.initials: R
authors.lastname: Ponmalar
authors.affiliation: Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India.
authors.forename: Ravikumar
authors.initials: R
authors.lastname: Manickam
authors.affiliation: ROSALINA India Private Limited, Mumbai, Maharashtra, India.
authors.forename: James
authors.initials: J
authors.lastname: Mazarello
keywords: Air-kerma strength; brachytherapy; high-dose rate; reference air-kerma rate; well-type ionization chamber