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.
Images reconstructed by iterative weighted Landweber algorithm using noiseless computer simulated data. (First column) 500 iterations. (Second column) 5000 iterations. (First row) Display with a full gray-scale from minimum to maximum for each image. (Second row) Line profiles along the horizontal small dots. (Third row) Line profiles along the vertical small dots.
