Evaluation of the average absorbed dose in digital breast tomosynthesis: A phantom-based model.
Lamastra R. per la Collaborazione RADIOMA
V - Biofisica e fisica medica
GSSI Ex ISEF - Aula B - Venerdì 27 h 15:30 - 19:00
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In this study a simple method to evaluate the average absorbed dose in digital breast tomosynthesis procedures is developed. A new physical quantity (Average Absorbed Breast Dose, 2ABD) is proposed as a new dosimetric index, according to the European Directive EU59/2013. In order to compute 2ABD, a model for evaluating the incident air-kerma has been developed and the absorption properties of a water-equivalent phantom at different depths have been investigated. Only tube voltage, tube load, breast thickness, focus-to-surface distance, anode-filter combination and X-ray tube yield are required to calculate 2ABD. Four mammographic devices have been employed to validate this method.