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Gamma analysis (2%-2mm; 3%-3mm)

Three beam models (profiles)

6mm diameter ion chamber (BM6)

4mm diameter ion chamber (BM4)

True profiles (analytic fitting/deconvolution)(BM08)

Guanghya Yan et al. Med Phys 35(8) 2008

3%-3mm

2%-2mm

The use of the appropiate

detector has a direct impact in

the results of gamma

evaluation; agreement

between planning and delivery

Performance testing – ex. Accuracy of configuration data-

volume averaging