Journal of Cancer Research and Therapeutics

BRIEF COMMUNICATION
Year
: 2008  |  Volume : 4  |  Issue : 2  |  Page : 88--90

Multileaf collimator transmission from the first Hi-Art II helical tomotherapy machine in India


Rajesh A Kinhikar 
 Department of Medical Physics, Tata Memorial Hospital, Parel, Mumbai, India

Correspondence Address:
Rajesh A Kinhikar
Department of Medical Physics, Tata Memorial Hospital, Parel, Mumbai - 400 012
India

The purpose of this study was to measure the multileaf collimator (MLC) transmission from the first Hi-Art II tomotherapy machine installed at the Advanced Center for Treatment, Research, and Education in Cancer (ACTREC). The MLC transmission was measured with an A1SL ion chamber and the radiographic extended dose range (EDR2) film in virtual water slabs at 1.5-cm depth with a source-to-surface distance of 85 cm. The MLC transmission was measured for 30 s with all leaves open and for 360 s with all leaves closed. The movable jaws were set to the calibration field size of 5 40 cm at isocenter. The MLC transmission was found to be 0.3% with the ion chamber and 0.32% with the film. Thus, the MLC transmission value was found well within the manufacturer tolerance of 0.5%. MLC can safely be used for the beam modulation during intensity-modulated radiotherapy (IMRT) to deliver accurate doses to the patients.


How to cite this article:
Kinhikar RA. Multileaf collimator transmission from the first Hi-Art II helical tomotherapy machine in India.J Can Res Ther 2008;4:88-90


How to cite this URL:
Kinhikar RA. Multileaf collimator transmission from the first Hi-Art II helical tomotherapy machine in India. J Can Res Ther [serial online] 2008 [cited 2021 Apr 11 ];4:88-90
Available from: https://www.cancerjournal.net/article.asp?issn=0973-1482;year=2008;volume=4;issue=2;spage=88;epage=90;aulast=Kinhikar;type=0