Centering Distance Collimation - Video Lesson

Hey, everybody. Welcome back in this video. We're talking about quality control and radiography. As it relates to the centering distance and collimation of the X-ray machine, we'll start by talking about the centering. The actual center of the x-ray beam must align to the centering indicator within one percent of the SID. What does that even mean? Well, hopefully this doesn't alarm you, but the light field, like our laser lights in the beam that are showing us where the center of the x-ray beam is is not always the exact center of the actual x-ray field. In the illustration here, I've shown you what that can look like. We'll say the red dot is our laser lights showing us the exact center of the x-ray field but the yellow dot is the actual center of the x-ray field. So this difference has to be tested. And the difference between the indicated center and the actual