  This paper discusses methods for reducing beam hardening effects using
spectral data for biomaterial applications. A small-animal spectral scanner
operating in the diagnostic energy range was used. We investigate the use of
photon-processing features of the Medipix3RX ASIC in reducing beam hardening
and associated artefacts. A fully operational charge summing mode was used
during the imaging routine. We present spectral data collected for metal alloy
samples, its analysis using algebraic 3D reconstruction software and volume
visualisation using a custom volume rendering software. Narrow high energy
acquisition using the photon-processing detector revealed substantial reduction
in beam hardening effects and metal artefacts.
