At ELETTRA, in Trieste, there is the only synchrotron radiation (SR) facility for performing mammographic exams using monochromatic and tunable SR beam. In the present study the Mean Glandular Dose (MGD) and Entrance Skin Exposure (ESE) delivered to 70 patients, who underwent clini- cal exams with both Digital Mammography and Mammography with SR (MSR) are compared. The results show that both MGD and ESE in MSR are lower than in DM. Moreover the ESE in MSR exams is approximately independent from the breast thickness.