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.
Reconstructed in-plane CNR and SNR for spheres of various sizes, activity concentration ratio and imaging time. The solid horizontal line in (b) and (d) marks the CNR being equal to 4, which is the requirement specified by the Rose criterion for good lesion detection. No interpretable results for 1 mm diameter spheres were obtained in this study.
