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.
End‐to‐end testing using the OSMS QA phantom from the first three months of operation. The daily variations of isocentric coincidence in the translational and rotational direction between the CBCT and OSMS (a) and between the CBCT and MV/kV planar images (b). The average and maximum absolute values of the daily Winston‐Lutz test performed at four gantry (0°, 90°, 180°, 270°), four couch (0°, 45°, 270°, 315°), and four collimator angles (0°, 45°, 270°, 315°) are shown in (c).
