Jayesh K. and Ganesh T. and Suganthi D. and Mohan R. and Rakesh C. J. and Sarojkumar D. M. and Jacob S. J.
Dosimetric Comparison of aSi1000 EPID and ImatriXX 2D Array System for Volumetric Modulated Arc and Intensity Modulated Radiotherapy Patient Specific Quality Assurance
393 - 395
2013
7
3
International Journal of Physical and Mathematical Sciences
https://publications.waset.org/pdf/5548
https://publications.waset.org/vol/75
World Academy of Science, Engineering and Technology
Prior to the use of detectors, characteristics
comparison study was performed and baseline established. In patient
specific QA, the portal dosimetry mean values of area gamma,
average gamma and maximum gamma were 1.02, 0.31 and 1.31 with
standard deviation of 0.33, 0.03 and 0.14 for IMRT and the
corresponding values were 1.58, 0.48 and 1.73 with standard
deviation of 0.31, 0.06 and 0.66 for VMAT. With ImatriXX 2D
array system, on an average 99.35 of the pixels passed the criteria
of 33 mm gamma with standard deviation of 0.24 for dynamic
IMRT. For VMAT, the average value was 98.16 with a standard
deviation of 0.86. The results showed that both the systems can be
used in patient specific QA measurements for IMRT and VMAT.
The values obtained with the portal dosimetry system were found to
be relatively more consistent compared to those obtained with
ImatriXX 2D array system.
Open Science Index 75, 2013