Which statement correctly defines MHz?

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Multiple Choice

Which statement correctly defines MHz?

Explanation:
MHz is a unit of frequency, representing how many cycles of the ultrasound wave occur each second. It measures how fast the wave oscillates, not how fast it travels or how much energy it carries. The speed of the beam depends on the medium (speed of sound in tissue), and the distance traveled per cycle is the wavelength (speed divided by frequency). So MHz tells you the cycles per second, with higher MHz meaning more cycles each second, which typically yields shorter wavelengths and better image resolution but less penetration. For example, 5 MHz means five million cycles per second.

MHz is a unit of frequency, representing how many cycles of the ultrasound wave occur each second. It measures how fast the wave oscillates, not how fast it travels or how much energy it carries. The speed of the beam depends on the medium (speed of sound in tissue), and the distance traveled per cycle is the wavelength (speed divided by frequency). So MHz tells you the cycles per second, with higher MHz meaning more cycles each second, which typically yields shorter wavelengths and better image resolution but less penetration. For example, 5 MHz means five million cycles per second.

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