A, Posterior planar scintigraphic image from a Tc99m-MDP bone scan demonstrates asymmetric sacral uptake without a horizontal strut in the setting of SIF.

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Presentation transcript:

A, Posterior planar scintigraphic image from a Tc99m-MDP bone scan demonstrates asymmetric sacral uptake without a horizontal strut in the setting of SIF. B, Tc99m-MDP bone scan on a different patient demonstrates the classic Honda sign characteristic of SI... A, Posterior planar scintigraphic image from a Tc99m-MDP bone scan demonstrates asymmetric sacral uptake without a horizontal strut in the setting of SIF. B, Tc99m-MDP bone scan on a different patient demonstrates the classic Honda sign characteristic of SIFs. Note, incidentally, physiologic activity within the bladder in both cases. E.M. Lyders et al. AJNR Am J Neuroradiol 2010;31:201-210 ©2010 by American Society of Neuroradiology