Physics Bucharest 2017

pro’s and con’s of semiconductor/diode dosimetry

pro’s

con’s

- small dimensions (~ mm) - little volume averaging

- energy dependence, Si  over-response for low photon energies - temperature dependence (in-vivo) - dose-rate dependent response (SSD) - beam directional dependence - single point - radiation damage  gradual decrease in response

- suited for OF stereotactic fields - reading immediately avaliable - linear dose response - PDDs in electron beams: R  dose (in contrast to ionization chambers) - suited for dose-rate measurement