Test purpose
Evaluate the error detection capability of the IQM System.
Test method
A variety of clinical treatment plans consisting of head & neck VMAT and IMRT cases, a larynx VMAT, a lung VMAT as well as a stereotactic lung technique were evaluated.
A number of errors were introduced at different times during the beam delivery. These errors included single segment retraction of leaves, dose changes of 10MU, 5MU and 2MU.
Test results
IQM was able to detect small errors in beam delivery with respect to a pre-calculated beam. All errors were detected without any user interaction.
Conclusion
IQM does an excellent job in real-time monitoring of beam delivery.
Sensitivity and specificity can be expected to be sufficient for clinical
practice.
