Open AccessEvaluation and validation of IBA I'MatriXX array for patient-specific quality assurance of tomotherapy®
Author(s) -
N. V. N. Madhusudhana Sresty,
Alluri Krishnam Raju,
B Nagarjuna Reddy,
V C Sahithya,
Yakub Mohmd,
Gourav Kumar,
T. Anil Kumar,
Tasneem Rushdi,
S Aparna,
Girijesh Prasad,
Harjot Kaur Bajwa
Publication year - 2019
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/jmp.jmp_11_19
Subject(s) - tomotherapy , quality assurance , medical physics , nuclear medicine , medicine , computer science , radiation therapy , radiology , external quality assessment , pathology
TomoTherapy ® is a modern radiation treatment technique in which intensity-modulated radiation therapy (IMRT) is delivered in helical fashion. A two-dimensional (2D) array which has been existing for IMRT patient-specific quality assurance (PSQA) verifications for many years is I'MatriXX. Our objectives were to validate this I'MatriXX and to evaluate it for different patient sites and fractionation schedules of TomoTherapy treatment. Twenty-five plans were created with virtual target for different possible pitch values and field widths for validation. Gamma index criteria of 3%/2% dose differences and 3/2 mm distance to agreement were used. QA plans of 26 different treatment sites and different fractionation schedules were used. Results indicated that the matrix response is independent of field width, pitch, and modulation factor of TomoTherapy with 3%, 3 mm criteria. High passing rate ranging from 99.7% to 90.7% was observed for selected patient plans. We found that I'MatriXX 2D array can be utilized for easy and quick TomoTherapy PSQA.