Master the ARDMS Ultrasound Physics 2026 – Zap Through Waves & Ace Your Exam!

The unit of measurement for frequency in ultrasound is typically expressed in megahertz (MHz), especially in medical ultrasound applications. This is because most diagnostic ultrasound systems operate within a frequency range that commonly falls between 1 MHz and 20 MHz. Frequencies at this range are effective for imaging soft tissues, providing good resolution without excessive attenuation.

While hertz (Hz) is the basic unit of frequency and is applicable to all forms of wave phenomena, it is more commonly used for lower frequencies. Kilohertz (kHz) can also be relevant for certain applications, such as industrial ultrasound, but it is not the standard in the context of medical imaging. Gigahertz (GHz) represents much higher frequencies that are beyond the typical range used in ultrasound and are more associated with radar and microwave technologies. Thus, megahertz is the most appropriate and commonly used unit when discussing ultrasound frequency in a diagnostic setting.