Illustration of CATS functionality Illustration of CATS functionality.A, APE to determine the positions of the scalp and CC by examining intensities along the central column of pixels from a midline sagittal T2-weighted image.B, Automated contours and a bisecting line on a 2-second axial obl... Illustration of CATS functionality.A, APE to determine the positions of the scalp and CC by examining intensities along the central column of pixels from a midline sagittal T2-weighted image.B, Automated contours and a bisecting line on a 2-second axial oblique T1-weighted gradient-recalled echo image. Note that brightest point lies within the cross section of the superior sagittal sinus (SSS) as a result of entry-flow phenomenon.C, Outline of the CC, triangle search mask, and Talairach AC-PC reference line on a midline sagittal T2-weighted image. Kenneth L. Weiss et al. AJNR Am J Neuroradiol 2003;24:922-929 ©2003 by American Society of Neuroradiology