Waves and Media Properties - Video Lesson

Hey, everybody. Welcome back to our sonography series. Today, we will discuss sound waves and media properties, specifically density, stiffness, and acoustic impedance. Ultrasound imaging relies on sound waves propagating through different tissues. The characteristics of these waves, how they are transmitted and reflect, depend heavily on the density and stiffness of the media. Understanding these concepts is essential for interpreting sonographic images accurately and optimizing imaging quality. Let's get started. First, let's discuss density. Density is the mass per unit volume of material and is measured in kilograms per cubic meter. It reflects how closely packed the particles of a material are. Water and other fluids have low densities, whereas dense media such as calcifications, metallic implants, foreign bodies, or certain tumors have high densities.