Artifact

Category Artifact Term Side Lobe Artifact Definition of Side Lobe Artifact Off-Axis Energy That Produces Spurious Echoes Outside Main Beam Notes About Side Lobe Artifact Can Create False Structures

Category Artifact Term Acoustic Shadowing Definition of Acoustic Shadowing Hypoechoic or Anechoic Area Distal to a Strongly Attenuating Structure That Blocks Sound Notes About Acoustic Shadowing Seen With Bone, Calculi, or Dense Foreign Bodies

Category Artifact Term Edge Shadowing Artifact Definition of Edge Shadowing Artifact Shadowing At Curved Structure Edges Due To Refraction And Beam Divergence Notes About Edge Shadowing Artifact Common At Gallbladder And Cyst Margins

Category Artifact Term Scintillation Artifact Definition of Scintillation Artifact Rapid Fluctuation In Echo Intensity Due To Microbubble Or Gas Motion Notes About Scintillation Artifact Seen In Contrast And Air Containing Regions

Category Artifact Term Aliasing (Wrap Around) Definition of Aliasing (Wrap Around) Appearance Of Anatomy From Outside Field Of View Wrapped Into Image Due To Undersampling Notes About Aliasing (Wrap Around) Prevent With Larger FOV Or Oversampling

Category Artifact Term Comet Tail Definition of Comet Tail Short, Dense Reverberation Artifact From Closely Spaced Reflectors Notes About Comet Tail Seen With Metallic Objects And Some Calcifications

Category Artifact Term Speckle Definition of Speckle Grainy Texture From Constructive and Destructive Interference of Scattered Echoes Notes About Speckle Speckle-Reduction Algorithms Improve Image Clarity

Category Artifact Term Comet Tail Artifact Definition of Comet Tail Artifact Series Of Closely Spaced Reverberation Echoes From Small Reflectors Notes About Comet Tail Artifact Seen With Metallic Objects And Some Calcifications

Category Artifact Term Acoustic Enhancement Definition of Acoustic Enhancement Increased Echogenicity Deep to a Fluid-Filled Structure Due to Low Attenuation of Sound Notes About Acoustic Enhancement Common Beneath Cysts or the Urinary Bladder

Category Artifact Term Chemical Shift Artifact Definition of Chemical Shift Artifact Misregistration Between Fat And Water Signals Causing Edge Displacement Notes About Chemical Shift Artifact Affected By Bandwidth And Field Strength