Pulsed Ultrasound

With the exception of continuous wave Doppler, all diagnostic ultrasound modalities use pulsed ultrasound.  By using pulsed ultrasound, the computer can time each pulse-echo sequence and thereby accurately determine the location of the interface that produced the echo.  To understand pulsed ultrasound you need to have a good understanding of the following five concepts:

• pulse duration

• spatial pulse length

• pulse repetition period

• pulse repetition frequency

• duty factor

To help you with this understanding, I have created the following four videos:

• Pulsed ultrasound part 1: Introduction to pulsed ultrasound

• Pulsed ultrasound part 2: Pulse Duration and Spatial Pulse Length

• Pulsed ultrasound part 3: PRP and PRF

• Pulsed ultrasound part 4: Duty Factor