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.
Three steps of the tube-fitting process. Farthest left is the sampled data from the SPECT image; center is the centerline produced by the curve-fitting algorithm; right is the fitted tube, shaded by tracer concentration (red is higher concentration, black is lower).
