BLOCK 3: Image Acquisition, Artifacts, & Doppler Ultrasound

BLOCK 3: Image Acquisition, Artifacts, & Doppler Ultrasound

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Learning Objectives By Lesson
Image Resolution

Describe what is meant by spatial resolution
Explain the difference between axial, lateral, and elevational resolution
Identify what axial resolution is independent of and dependent on
Identify depth-dependent forms of spatial resolution
Identify the most reliable spatial measurements on ultrasound

Pulse Echo Operation

Describe how an ultrasound beam is formed in the pulse echo mode of operation
List the various pulse echo modes of operation
Describe pulse repetition frequency (PRF) and pulse repetition period (PRP), and how they are related to each other
Explain what the duty cycle represents

Image Display Modes & Frame Rate

Describe the difference between A-mode, B-mode, and M-mode imaging displays
Explain how 2D-images are created with ultrasound
Describe and calculate frame rate
Identify factors that affect the frame rate

Contrast Agents

Describe what contrast agents are and how they can produce signal
Describe harmonic imaging and how it can enhance contrast imaging
Describe pulse inversion harmonic imaging and how it can enhance contrast imaging

Imaging Artifacts

Explain what ultrasound imaging artifacts represent and why they occur
Identify refraction artifacts and describe why they occur
Identify beam width artifacts and describe why they occur
Identify shadowing artifacts and describe why they occur
Identify enhancement artifacts and describe why they occur
Identify reverberation artifacts and describe why they occur
Identify side lobe artifacts and describe why they occur
Identify multipath reflection artifacts and describe why they occur
Identify range ambiguity artifacts and describe why they occur

Doppler Ultrasound

Describe the Doppler effect
Explain how to estimate red blood cell velocity
Describe the importance of the Doppler angle when calculating red blood cell velocity
Describe the difference between continuous wave Doppler and pulse wave Doppler

Image Resolution

Duration: 20:18
Pulse Echo Operation

Duration: 19:39
Image Display Modes & Frame Rate

Duration: 22:11
Contrast Agents

Duration: 12:00
Review: Ultrasound Image Acquisition
Imaging Artifacts

Duration: 27:00
Doppler Ultrasound

Duration: 24:20
Review: Artifacts & Doppler Ultrasound

Progress

Instructors

GCU Education Team
Physician Educators