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.
Sagittal view at mean position for the numerical phantom series. Shown are: (a) static mean position of the 3 cm phantom, and average CTs (AVG-CT) for the following excursions: (b) 2 cm, (c) 3 cm, (d) 4 cm, (e) 3 cm with diaphragm shifted 1 cm superior, and (f) 3 cm with diaphragm shifted 1 cm inferior. The surrounding regions represent the diaphragm and lung (ρ=1.0 and 0.2 g∕cc, respectively), with the isocenter as the GTV center of mass (ρ=1.0 g∕cc).
