Radiology, Vol 123, 631-638, Copyright © 1977 by Radiological Society of North America
The tentorium in axial section. I. Normal CT appearance and non- neoplastic pathology
TP Naidich, NE Leeds, II Kricheff, RM Pudlowski, JB Naidich and RD Zimmerman
Bands of increased density representing the free edges and lateral margins
of the tentorium were routinely identified on 100 sequential, normal,
contrast-enhanced axial CT scans of good quality. Because the tentorium has
a complex shape, the exact configuration of these bands varies with the
level and the angle of the CT section. Comparison of CT scans with anatomic
specimens permits an understanding of these varying configurations, and
provides a means to estimate the position of the tentorium on non-contrast
CT studies. The CT manifestations of diverse non-neoplastic diseases
including subarachnoid hemorrhage, arteriovenous malformation, venous sinus
thrombosis and Dandy-Walker malformation may be understood, in part, in
terms of the configuration and density of these tentorial bands.
