Assessment of effective dose equivalent to patients resulted from mammography

The investigation is carried out in order to calculate effective equivalent dose and to compare on it's basis various mammographic methods using native units. The measurements of absorbed doses were carried out using TLD dosimeters in phantoms of Alderson average man and in phantoms of mammary gland. Effective equivalent dose in case of fluoromammography without diaphragm was 1.47 mSv and with diaphragm was 1.26 mSv. Application of protective diaphragm decreases irradiation dose for lungs, thyroid red bone marrow and gonads by 2-3 fold. However it doesn't considerably influence the value of the effective dose for it's value is mainly conditioned by the irradiation risk of mammary gland tissue. In view of possible considerable error in calculation of equivalent dose it is recommended alongside with it's calculation to use other indices of patients' radiation protection. 2 refs.; 1 tab