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.
From left-to-right: Zero-angle projection ROIs (128 × 128 pixels) from scans with P = 1, 5, and 15 total projections. Applying Eq. 3 with fixed total exposure (N0 = 1010 source photons) and increasing P leads to increased quantum noise per projection.
