Imaging for early stage breast cancer

Thoracic shield & Dosimetry The presence of the shield will generate backscattered electrons and this gives a local overdosage. The range of BS electrons is roughly one cm and most of them are absorbed in the Aluminum layer

12 MeV Depth dose curve Monte Carlo Simulation, with and without the shield placed at the depth of the 90% isodose line With our composite shield, the local overdosage is limited to 10% and gives even a more homogeneous dose distribution. (also confirmed by physical measurements)