Beam Quality I - Video Lesson

Hey, everybody. Welcome back. In this video, we're talking about a characteristic of the x-ray beam called beam quality. Beam quality describes the average energy of the photons in an x-ray beam. It's important we don't confuse beam quality with beam quantum quantity. So remember, quantity refers to the number or amount of x-ray photons, but quality is different. And refers to the energy of those photons. Here's an example that's similar. Let's say a pitcher throws ten pitches during one inning of the baseball game. That's the quantity, ten volts. Each of these pitches though came in at different velocities. Let's say, in this case, the average velocity is eighty six miles per hour. We would call this the quality. So the quantity is the total number of pitches, but the quality was their average velocity. The average velocity is calculated by adding together all of the velocities and