Diagram of a semiquantitative method for diagnosing osteoporotic vertebral fractures. The semiquantitative method was developed for identification of osteoporotic vertebral fractures based on measurement of vertebral height, identifying the anterior, middle, and posterior heights of each vertebra. Depending on their relative relations according to a given reference, three types of fractures are identified: wedge, biconcave, and compression, according to three degrees of severity, ranging from mild through moderate to severe. The wedge fractures are characterized by deformed structure of the anterior part of the vertebrae, the biconcave of the middle part, and the compression of the total vertebrae. Reprinted from Lenchik et al.  with permission from the American Journal of Roentgenology.