The amount of ultrasound absorption depends on

The amount of ultrasound absorption depends on

• A. Water content of tissues
• B. Protein content of tissues
• C. Temperature of tissue
• D. Lipid content of tissues

Answer: (B)

Ultrasound absorption is driven by how tissue molecules interact with the acoustic wave, turning part of that energy into heat. Tissues with high protein content have dense molecular structures (like collagen and muscle proteins) that interact with the wave more readily, so more energy is dissipated per unit distance and attenuation is higher. Lipid- or water-rich tissues don’t absorb as much energy in the same frequency range, and while temperature can change absorption slightly, it isn’t the main driver. So among the options, protein content best explains why some tissues absorb more ultrasound energy than others.

Ultrasound absorption is driven by how tissue molecules interact with the acoustic wave, turning part of that energy into heat. Tissues with high protein content have dense molecular structures (like collagen and muscle proteins) that interact with the wave more readily, so more energy is dissipated per unit distance and attenuation is higher. Lipid- or water-rich tissues don’t absorb as much energy in the same frequency range, and while temperature can change absorption slightly, it isn’t the main driver. So among the options, protein content best explains why some tissues absorb more ultrasound energy than others.