Journal of Medical Physics
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Year : 2009  |  Volume : 34  |  Issue : 3  |  Page : 188-190

Verification of tomotherapy dose delivery

1 Department of Medical Physics, The Gujarat Cancer & Research Institute, NCH Campus, Asarwa, Ahmedabad-380016, India
2 Department of Human Oncology, K4/310 Clinical Science Centre, 600 Highland Avenue, University of Wisconsin-Madison, Madison, WI 53792, USA

Correspondence Address:
S M Pelagade
Department of Medical Physics, The Gujarat Cancer & Research Institute, NCH Campus, Asarwa, Ahmedabad - 380 016
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-6203.54856

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Seventy-one patient-specific delivery quality assurance (DQA) plans for the Tomotherapy HI-ART II helical tomotherapy system (TomoTherapy, Inc., Madison, WI, USA) were measured using film and ion chamber. The agreement in absolute point dose was 1.19 0.79%, 1.91 1.39%, 2.14 1.3%, 1.3 0.73% and 1.67 1.5% for head and neck, prostate, pelvis-abdomen sites, and for all other sites. The spatial agreement between the calculated and the measured film dose distributions was evaluated using the gamma metric distribution. The average frequency versus gamma interval was plotted as a bar graph to quantify the gamma index variation inside the region of interest for each body site.

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