What is the use of MatriXX Output calibration factor?
MatriXX is for relative dosimetry and its measurement results are not in Gy, but in counts (cnt). In order to compare the result with TPS dose plan, which is Gy, we need to convert cnt to Gy.
Output factor is the number that converts cnt to Gy.
For example, MatriXX measures 100cnt, and we know that the dose received by MatriXX should be 10Gy, then the Output factor is 10Gy/100cnt=0.1Gy/cnt