Figure 4.
MV image of a control point projection acquired with the EPID, without (left) and with (center) Laplacian of Gaussian (LoG) filtering, which enhanced the fiducials, and after the removal of field edges with the mask (right).
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.