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.
Noise reduction ratios using various levels of noise reduction reconstruction for the dosimetry phantom (a) and head phantom (b). The 5, 2.5, 1.25, and 0.625 mm thick images were reconstructed using various levels of DLR and HIR. D and H indicate DLR and HIR, respectively.
