Intro and Shadowing Slide 1 of 623456 Artifacts "Tricks of physics" Identify pathology Avoid pitfalls Optimize image Continue Shadowing Ultrasound beam encounters a “stiff” object Bones Stones Continue Shadowing Gallstones Shadowing is necessary If no shadow consider polyp, sludge Continue Posterior acoustic enhancement Increased brightness in far field when passing trough fluid Adjust gain d Continue Posterior acoustic enhancement Adjust time-gain-compensation (TGC) Or “i-scan” Continue Posterior acoustic enhancement Can help identify abscess, particular when pus is more isoechoic Continue Artifacts in Ultrasound --- Table of Contents --- Lesson NameMinutes id Intro and Shadowing1 241 Edges and Mirrors1 242 Sidelobe1 243 Reverb Comets and Rings1 244 Doppler and Summary1 245
