A comparison research of the energy response for seven commercially available mammography dosimeters

Objective: To evaluate the least energy dependent response dosimeters in the comparison research. Methods: According to GB/T 19629-2005, the energy response of seven commercially available mammography dosimeters was determined for ten standard radiation qualities in the range 20-40 kV at the SSDL using a reference-class dosimeter. Results: The error range of correction factors of energy response, three type chambers are 3.0%, 3.3% and 3.3% respectively; three type semiconductor detectors are 3.8%, 36% and 43% and one type thermoluminescent dosimeter is 29%. Conclusion: Radcal 9095 dosimeter have the least energy response. Other type chambers have better energy response than semiconductors and TLD dosimeters. (authors)