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.
(a) Gamma Knife IconTM and its CBCT system in an imaging setup. (b) A vendor‐provided tool was used to measure deviations of the radiation isocenter and the accuracy of CBCT images. The white arrow indicates the diode detector used to measure dose distributions, and the dotted arrow indicates one of the four ball bearings employed to assess the geometrical accuracy of the CBCT images. (c) A CatPhan® 503 phantom was used for CBCT image quality assessment.
