Test purpose
Test the intra-fractional (short-term) repeatability of the IQM Signal.
Test method
Intra-fraction repeatability was checked by delivering 15 times (about 2 hours) the same plan, composed by 17 square fields 4 cm x 4 cm and 1 larger field 10 cm x 10 cm irradiating different regions of the detector.
Test results
Global and local intra-fraction detector constancy results demonstrate the optimal detector performance for IMRT plan QA.
Conclusion
IQM provides a very good short-term signal reproducibility for complex IMRT plans.
