Artifacts in urinary tract ultrasonography.
Ultrasound is the only technique that uses artifacts in diagnosis. "Good through transmission" and a "refractive artifact" indicate fluid. Acoustic shadowing can be produced by different tissues leading to different types of shadows and specific diagnoses. Fat produces a decrease in the speed of sound as compared with soft tissue leading to the writing of structures behind fat distal to their actual position. Other artifacts are also described.
Rosenfield
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AT
Yale University School of Medicine, New Haven, CT 06510.
D005260:Female; D006801:Humans; D008297:Male; D014463:Ultrasonography; D014551:Urinary Tract / Q000000981:diagnostic imaging*; D014570:Urologic Diseases / Q000000981:diagnostic imaging*