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.
The intrafraction amplitude variability given for the anterior–posterior and superior–inferior directions for tumor to vessel and for tumor to abdomen surface for the entire length of the datasets (a) and for only the breath‐hold portions of the series (b).
