New aspects in evaluation of the average-absorbed dose of the parenchyma in mammography

Schneider, G.; Kindl, P.; Spreizer, H.

Rofo Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin 128(1): 82-86


ISSN/ISBN: 1438-9029
PMID: 146669
DOI: 10.1055/s-0029-1230795
Accession: 068522118

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Over 2000 measurements have been made on a mammaphantom to ascertain radiation exposure curves for skin and parenchyma. The exposure of the parenchyma is definitely depending on the thickness of the fatlayer above the parenchyma. Until now radiation exposure was calculated under the assumption that the different breast tissues are equally distributed. In doing so exposure was estimated too high (up to a factor 3-especially in fatter breasts). The individual absorbed dose in the parenchyma can be reckoned out by the various figures and tables, which consider technical criteria, different sizes of the breast and two film systems.