Which of the following is NOT a factor affecting attenuation of the ultrasound beam?

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Multiple Choice

Which of the following is NOT a factor affecting attenuation of the ultrasound beam?

Explanation:
Attenuation describes how the ultrasound beam loses energy as it travels through tissue. The main ways this happens are absorption (the wave’s energy is converted to heat) and scattering (energy is spread in other directions). At boundaries between tissues, part of the energy is reflected back, which also reduces the forward-going beam. The speed of sound in a medium, however, does not determine how much energy is lost; it affects how fast the wave travels and the timing/wavelength but not the amount of attenuation. Therefore propagation speed is the factor that does not influence attenuation.

Attenuation describes how the ultrasound beam loses energy as it travels through tissue. The main ways this happens are absorption (the wave’s energy is converted to heat) and scattering (energy is spread in other directions). At boundaries between tissues, part of the energy is reflected back, which also reduces the forward-going beam. The speed of sound in a medium, however, does not determine how much energy is lost; it affects how fast the wave travels and the timing/wavelength but not the amount of attenuation. Therefore propagation speed is the factor that does not influence attenuation.

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