Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Epidural tumor extension volumes were estimated by measuring their maximum sizes in each of the three orthogonal planes on T2-weighted MRI, approximating the structures to rectangular solids. Height and depth were measured on the sagittal view (a), and width was measured on the axial view (b). 
