Performance Test – Dose output
How much does the IQM signal change when the dose output is changed by 1% from 100MU to 101MU?
A 1% change in dose output results in a 1% change in IQM signal
Similar proportional changes have been achieved for field sizes of 5cm x 5cm, 10 cm x 10cm, 20cm x 20cm as well as dose output changes of 0.5%, 10% and 100%
Performance Test - Beam Placement/Position
How much does the IQM signal change when a 4cm x 4cm field is shifted 5mm off-axis?
Moving a beam by 5mm changes the IQM signal
by up to 2.2%.
Similar results have been achieved when applying the same change
at different beam locations and different shift directions.
Shifts of 3mm are also well detectable.
Performance Test - Intensity Map changes
How much does the IQM signal change when the intensity map of an IMRT beam is changed?