Which of the following is NOT listed as a factor that affects ultrasound?

Which of the following is NOT listed as a factor that affects ultrasound?

• A. Hydration
• B. Age
• C. Composition
• D. Glass thickness

Answer: (D)

Ultrasound in therapy is affected by how the wave travels through body tissues, which depends on tissue composition, hydration, and structural characteristics that determine impedance and attenuation. Hydration changes the water content of tissues, altering attenuation and heating. Age can bring changes in tissue composition that influence how the wave propagates. Composition refers to the mix of fat, muscle, bone, and other tissues, each with its own acoustic properties, affecting speed and attenuation. Glass thickness isn’t a factor in this context because the energy path for therapeutic ultrasound goes through the coupling gel into the skin and underlying tissues, and device performance is calibrated for those tissue interactions rather than any glass layer.

Ultrasound in therapy is affected by how the wave travels through body tissues, which depends on tissue composition, hydration, and structural characteristics that determine impedance and attenuation. Hydration changes the water content of tissues, altering attenuation and heating. Age can bring changes in tissue composition that influence how the wave propagates. Composition refers to the mix of fat, muscle, bone, and other tissues, each with its own acoustic properties, affecting speed and attenuation. Glass thickness isn’t a factor in this context because the energy path for therapeutic ultrasound goes through the coupling gel into the skin and underlying tissues, and device performance is calibrated for those tissue interactions rather than any glass layer.