FIG 1. A, Line drawing on AP fluoroscopic view for calculation of moderate extravasation; 55 mm/90 mm is less than two-thirds the adjacent nonfractured vertebral body dimensions (figure not to scale).

B, Line drawing on lateral fluoroscopic view for calculation of moderate extravasation; 38 mm/70 mm is less than two-thirds the adjacent nonfractured vertebral body dimensions (figure not to scale).