Journal of Medical Physics
ORIGINAL ARTICLE
Year
: 2016  |  Volume : 41  |  Issue : 4  |  Page : 234--239

Dosimetric evaluation of newly developed well-type ionization chamber for use in the calibration of brachytherapy sources


Sathiyan Saminathan1, Henry Finlay Godson1, Retna Ponmalar1, Ravikumar Manickam1, James Mazarello2 
1 Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India
2 ROSALINA@ India Private Limited, Mumbai, Maharashtra, India

Correspondence Address:
Sathiyan Saminathan
Department of Radiation Physics, Kidwai Memorial Institute of Oncology, Dr. M. H. Marigowda Road, Bengaluru - 560 029, Karnataka, India
India

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.


How to cite this article:
Saminathan S, Godson HF, Ponmalar R, Manickam R, Mazarello J. Dosimetric evaluation of newly developed well-type ionization chamber for use in the calibration of brachytherapy sources.J Med Phys 2016;41:234-239


How to cite this URL:
Saminathan S, Godson HF, Ponmalar R, Manickam R, Mazarello J. Dosimetric evaluation of newly developed well-type ionization chamber for use in the calibration of brachytherapy sources. J Med Phys [serial online] 2016 [cited 2019 Jul 22 ];41:234-239
Available from: http://www.jmp.org.in/article.asp?issn=0971-6203;year=2016;volume=41;issue=4;spage=234;epage=239;aulast=Saminathan;type=0