Fig. 2From: Beam filtration for object-tailored X-ray CT of multi-material cultural heritage objectsSimulated scans without (top row) and with (bottom row) beam hardening, showing that dark streaks occur along the lines of greatest attenuation, and bright streaks occur in other directions. Also note the subtle “shadows” beneath the surface, which is caused by beam hardening and is called cupping artifact. Reprinted with permission from [44]Back to article page