Eggl, E., Malecki, A., Schaff, F., Potdevin, G., Noël, P.B., Bauer, J.S., Gordijenko, O., Grande Garcia, E., Burgkart, R., Rummeny, E.J., Baum, T. & Pfeiffer, F. Prediction of Vertebral Failure Load by Using X-Ray Vector Radiographic Imaging. Radiology 275, 553–561 (2015). [http://doi.org/10.1148/radiol.14141317]
Purpose: To examine whether x-ray vector radiographic (XVR) parameters could predict the biomechanically determined vertebral failure load.
Figure: (a) The vertebrae were scanned in a clinical multidetector CT scanner together with a calibration phantom to determine the trabecular BMD. (b) The Talbot-Lau grating interferometer was used for the XVR scans. It consists of an x-ray source, three gratings (G0, G1, and G2) separated by distances (d and L), the sample (S) in the Eulerian cradle, and the detector (D). The sample is rotated around the optical axis (red arrow) and, upon rotation, the visibility curve oscillates as a function of v 2 f, which is the angle between the orientation of the structure (f) and the orientation of the grating lines (v). (c) Image shows the experimental setup for the XVR scans. Shown are (from front to back) grating G1, the sample mounted in the Eulerian cradle, grating G2, and the detector. (d) Image shows a sample of a destructive biomechanical test that was performed to determine the failure load of the vertebral bodies.