These returning waves are then converted into an ultrasound image on the screen for you to view. These ultrasonic waves can then penetrate through the body’s soft tissue and return to the transducer as reflected ultrasound waves. Think about that each time you drop a probe. (FYI These crystals are easily broken and cost thousands of dollars to replace. It traditionally does this by using an effect called the “Piezoelectric Effect.” This is simply the vibration of a piezoelectric crystal at the tip of the transducer that generates a specific ultrasonic frequency to create ultrasound waves. Next let’s go over how an ultrasound device uses ultrasonic waves to create pictures on the screen for you. How Ultrasound Creates a Picture – The Piezoelectric Effect For example, 2.5-3.5 MHz for general abdominal imaging and 5.0-10 MHz for superficial imaging. It will usually range (termed bandwidth) between 2 Megahertz to 10 Megahertz. So the next time you pick up an ultrasound probe or transducer just notice what “Frequency” the probe is. However, ultrasound used in medical practice is typically 1,000,000 Hz (1 Megahertz) or greater. The frequency of ultrasound is by definition, any frequency greater than 20,000 Hz. The definition of “ultrasound” is simply the vibration of sound with a frequency that is above the threshold of what humans can hear. Best Ultrasound Physics Book Reference – Sidney K.Basic Ultrasound Terminology: “Echogenicity”.Acoustic Impedance – Reflection and Refraction.What Ultrasound Physics do you Actually Need to Know?.How Ultrasound Creates a Picture – The Piezoelectric Effect.Alright, let’s start your journey towards mastering Sonographic Physics and Artifacts in the easiest and most practical way possible! I’ll cover the most important concepts on how to understand Ultrasound Physics principles and Artifacts. Though beginners or experienced Point of Care Ultrasound users will find this post helpful, just think of this post as an “Ultrasound Physics for Dummies” guide or reference. Understand how important Ultrasound ARTIFACTS are Created (with full list/images of examples).
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