Bone algorithm CT images from the same case, demonstrating focal enlargement of the right tympanic segment, in the axial (left) and coronal (right) planes (at arrows). Bone algorithm CT images from the same case, demonstrating focal enlargement of the right tympanic segment, in the axial (left) and coronal (right) planes (at arrows). From Wiggins and Harnsberger (2001). Used with permission. R.H. Wiggins III et al. AJNR Am J Neuroradiol 2006;27:694-699 ©2006 by American Society of Neuroradiology