Fig. 13From: Multi-modal tomography to assess dechlorination treatments of iron-based archaeological artifactsDirection map: average directional change in attenuation coefficient \(\left\langle \Delta \mu \right\rangle \). The zone of interest clearly tends toward a decrease in neutron attenuation coefficients with no change in X-ray attenuation coefficients. The black envelop shows the border of the zone covering 99.9 % of the voxelsBack to article page