Figure 5. Fourth cervical vertebra (No. H25-2) of an undetermined diplodocid sauropod with broken parts of vertebral body and diapophysis modelled in polyester cast resin a) in left lateral view, red bars indicate axial cross-sections displayed in Figure 5b-d, scale bar (white) is 20 mm; b) axial section in the cranial third of the vertebra: both in the CT image (left) and the NT image (right), the polyester cast resin can be distinguished from bone, but only in the NT image the resin has a different colour than the matrix; nc = neural canal; c) axial section through the region of the diapophysis: in the CT image (left) margins between cavities filled with sediment are sharp but glue within the fractures is not displayed, whereas in the NT image (right) margins between sediment and bone are blurred and amounts of glue within the fractures is visible; d) axial section through the caudal part of the vertebral body and the postzygapophyses: the differences between X-ray CT and NT result in differences in the kind of displaying fractures filled with glue or polyester cast resin.