Artifact Descriptions
Multiple reflections are placed beneath the real reflector at separation intervals equal to the separation between the transducer and the real reflector
What is reverberation
Synonym for comet tail artifact
What is ring-down artifact
Internally generated electronic distortion when Doppler gain is set too high
What is noise
This is the cause of comet tail artifact
What is reverberation
Shows structures that exist on one side of a strong reflector as being present on the other side as well. Deeper than the real structure
Synonym for focal enhancement
What is focal banding
The upper limit to Doppler shift that can be detected properly by pulsed instruments
What is the Nyquist limit
Pulse width causes this type of artifact
What is lateral resolution
Causes a reflector to be positioned improperly (laterally) on the display
What is refraction
Synonym for section thickness artifact
What is slice thickness artifact
The most common artifact encountered in Doppler ultrasound
What is Aliasing
This artifact is caused by high attenuating structures
Occurs when the assumed value for propagation speed is incorrect
What is speed error artifact
Synonym for clutter artifact
What is flash artifact
The strengthening of echoes from reflectors that lie behind a weakly attenuating structure
What is enhancement
Low pulse repetition period causes this type of artifact
What is aliasing
The reduction in echo amplitude from reflectors that lie behind a strongly reflecting or attenuating structure
What is shadowing
Synonym for Nyquist limit
What is Nyquist frequency
Producing the pattern of bright and dark spots
What is speckle
This causes range ambiguity artifact
What is high pulse repetition frequency