TitleDosimetric considerations in mammography.
Publication TypeJournal Article
Year of Publication2000
AuthorsHatziioannou, K A., Psarrakos K, Molyvda-Athanasopoulou E, Kitis G, Papanastasiou E., Sofroniadis I, and Kimoundri O
JournalEur Radiol
Volume10
Issue7
Pagination1193-6
Date Published2000
ISSN0938-7994
KeywordsHumans, Mammography, Phantoms, Imaging, Radiometry
Abstract

The aim of this study was to measure the absorbed dose to seven organs other than the breast in mammography in order to calculate their contribution to the effective dose. The absorbed dose to these organs was measured using a lucite upper body anthropomorphic phantom containing thermoluminescent dosimeters (TLD) at appropriate locations, exposed as in a mammographic examination. In addition, the dependence of the absorbed dose on kVp, mAs and breast thickness was examined. The absorbed dose due to scattered radiation was found to be negligible to all organs except to the sternum red bone marrow (SRBM) and the thyroid. The mean doses to the SRBM and the thyroid, for a set of four exposures, one craniocaudal and one 90 degrees mediolateral per breast, simulating a complete breast screening examination, varied between 0.40 and 1.27 and 0.05-0.17 microGy mAs(-1), respectively, depending on the breast thickness and the kVp selection. Effective dose from mammography was also calculated based on the absorbed dose to the breast, the SRBM and the thyroid and tissue-weighting factors. The effective dose was found to vary between 0.66 and 0.85 microSv mAs(-1) depending on the breast thickness and the kVp value selected. The radiation dose to the breast contributes over 98% to the effective dose.

DOI10.1007/s003309900209
Alternate JournalEur Radiol
PubMed ID11003419
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