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) Calculated percent noise per Gy of delivered dose as a function of camera distance yo for the shielded and unshielded camera. Note, the relationship with yo does not exactly follow the invese square law, as yo is measured from camera lens to beam center, yet the true point source of stray radiation is located a distance SSD = 100 cm above the beam center. (b) Results and linear regression analysis for the percent noise as a function of delivered dose at a camera distance of 1.7 m.
