Open AccessVerification of tomotherapy dose delivery
Author(s) -
SM Pelagade,
Bhudatt Paliwal
Publication year - 2009
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 - 10.4103/0971-6203.54856
Subject(s) - tomotherapy , nuclear medicine , head and neck , pelvis , quality assurance , medicine , radiology , radiation therapy , surgery , external quality assessment , pathology
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.