Half-Value Layers (HVL) - Video Lesson

Hey, everybody. Welcome back. This video is about half value layer abbreviated H. V. L. In the context of this lesson, HDL is the amount of aluminum filtration required to reduce the beam intensity or exposure by half. At a specific exposure technique. You can think of half value layer like this. It is the layer thickness of aluminum, that will reduce the beam intensity to half of the original value. HDL is a way of measuring the hardness or average energy of the x-ray beam. This needs to be checked regularly because the HBL tends to increase over time. During the lifespan of the x-ray tube as it ages. Also, H. V. L affects the patient dose and H. V. L affects the image quality. Here's an example of how to manually calculate the HVL of the x-ray