Fig. 7.
A solid tissue-equivalent phantom containing a rod which can be manually translated back and forth. The rod incorporates a region with ten times the absorption of the surrounding rod and block.
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.