Attenuation (Coefficients and Considerations) - Video Lesson

Hey everybody. Welcome back to today's lesson on attenuation in ultrasound imaging. This lesson focuses on acoustic impedance, the attenuation coefficient, and the half value layer. Understanding attenuation is critical for optimizing image quality and selecting appropriate transducers for specific imaging scenarios. Remember, attenuation is a fundamental concept in ultrasound imaging that describes the gradual reduction in strength of an ultrasound wave as it travels through a medium. Let's go back and take a closer look at acoustic impedance. Remember, acoustic impedance is the acoustic resistance to sound traveling in a medium. If we have mediums with large differences in impedance, we will have a large amount of reflection and a small amount of transmission. For example, at soft tissue interfaces between muscle and fat, there is a very small difference in acoustic impedance.