  Plastic scintillators detectors (PSDs) have been studied as dosimeters, since
they provide a cost-effective alternative to conventional ionization chambers.
Measurement and analysis of energy dependency were performed on a Siemens
Mammomat tomograph for two different peak kilovoltages: 26 kV and 35 kV. Both
PSD displayed good linearity for each energy considered and almost no energy
dependence.
