Explore ultrasound quality assurance and performance testing, including tissue phantoms, resolution and measurement testing, transducer checks, Doppler testing, and the statistics used to evaluate diagnostic performance.

Learn why ultrasound artifacts happen, how to recognize common resolution, position, attenuation, and propagation artifacts, and when an artifact can help—or mislead—you during an exam. 

Learn how to optimize spectral and color Doppler using controls like PRF, scale, baseline, wall filter, gain, sample volume, angle correction, and color box settings—and how to troubleshoot common Doppler problems.

Break down the Doppler effect, Doppler shift and equation, angle relationships, and the principles behind continuous-wave, pulsed-wave, color, and power Doppler. 

Learn the physics of blood flow, including laminar and turbulent flow, resistance, pressure, energy, stenosis, Bernoulli’s principle, and the factors that determine how blood moves through vessels. 

Explore how ultrasound contrast agents work, how microbubbles interact with sound, and how contrast-specific imaging techniques use those responses to enhance visualization. 

Learn how harmonic frequencies are created, how tissue harmonic imaging works, and how techniques like pulse inversion and power modulation can improve image quality and reduce unwanted artifacts.

Understand how dynamic range and compression control the number of gray shades in an ultrasound image, how changing them affects contrast, and when a sonographer would increase or decrease dynamic range clinically.

Break down spatial and contrast resolution, including axial, lateral, and elevational resolution, what controls each one, and how different settings and physics relationships affect the system’s ability to separate structures and subtle differences in tissue.

Learn how ultrasound systems process and enhance image data, including pre- and post-processing, zoom, interpolation, compounding, frequency-based tools, edge enhancement, elastography, and 3D processing—and what those changes actually do to the image.

Follow the signal through the ultrasound system—from the pulser and beam former to the receiver—and learn how output power, gain, and signal processing shape the image you see on the screen.

Learn what controls temporal resolution and frame rate, including imaging depth, pulses per image, and the tradeoffs that affect how smoothly motion is displayed in real time.

Understand the third dimension of the ultrasound beam, how slice thickness affects image quality, and how array design, elevational focusing, and related beam behavior influence what appears on the image.

Learn how different transducer designs create, focus, steer, and sequence the ultrasound beam, and how those design choices affect image shape, footprint, and clinical use.

Learn the three fundamental ultrasound display modes, how each represents returning echoes, and how amplitude, brightness, and motion are displayed differently. 

Break down axial and lateral resolution, what determines each one, and why pulse length, beam width, and focusing affect the system’s ability to distinguish structures that are close together. 

Learn how ultrasound beams are shaped, where they narrow and widen, what determines focal depth, and how beam diameter changes through the near and far field.

Explore how ultrasound transducers create and receive sound, including their basic construction, the piezoelectric effect, and the key components that make pulse-echo imaging possible.

Learn how time-of-flight is used to determine reflector depth and why accurate distance calculations depend on assumptions about how fast sound travels through tissue.

Explore what happens when sound reaches an interface, including acoustic impedance, reflection, transmission, and refraction—and how those interactions affect echoes, artifacts, and scanning technique.