Fig. 2From: A novel, percutaneous, self-expanding, forceful reduction screw system for the treatment of thoracolumbar fracture with severe vertebral height lossIllustration of the radiographic measurements: VBI = a/b; HAMFV = a/(c + d); VBA and BCA are as shown in this figure. A 51-year-old male with a fracture at L1 segment required surgical treatment. His preoperative radiographic parameters were as follows: VBI, 0.25; HAMFV, 0.27; VBA, 30°; and BCA, 21°Back to article page