CT Scans in Art Work Appraisal
Dog, China. Terracotta, 58 cm.
B. CT: thin axial sections through the head, the forequarters and hindquarters (markers shown in Figure A). They reveal that the main tubular structures are composed of terracotta slabs. The CT scan emphasizes the different density of the slabs, proving that the dog has been assembled. The bulging cement joints inside the statue, which are of lower density and therefore lighter, show up clearly (arrows). The technique of assembling terracotta slabs cut out of excavation bricks and then carving them into a sculpture gives TL results compatible with an ancient piece.