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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Spine J. 2010 Mar 27;10(5):422–432. doi: 10.1016/j.spinee.2010.02.008

Figure 4.

Figure 4

Forward-viewing in drilled vertebral body II. The backscatter amplitudes increase over the last three peaks as the marrow-cortex interface is approached. Perforation of the M-C interface results in signal loss.