Fig. 4

Blunt cerebrovascular transection (grade V lesion according to the Biffl classification). A 24-year-old man who had suffered a motorcycle accident. In the axial MPR image (a) (3-mm thickness) contrast material is clearly recognisable within the left vertebral artery (arrow); moreover, active arterial bleeding causing contrast material extravasation is appreciable next to the left vertebral artery (arrowheads). The same findings are recognisable on the sagittal MPR image (b) (3-mm thickness) where an anterior sliding of C1 (arrowhead) over C2 is also appreciable. The coronal MPR image (c) (3-mm thickness) demonstrates that the aforementioned alterations are due to an odontoid process base fracture (type III fracture according to the Anderson classification) (arrowhead). The patient died shortly after the CT