300004969171/B Page 107 of 148
signals are usually lower than tissue features.
However, slow-moving (<1 cm/sec) acoustically
soft tissues, such as plaque and lipids, can give rise
to low level signals of the same order as faster
moving blood (>4 cm/sec). In these cases, the tissue
near
Saturation in the analog amplifiers following initial
transmit pulse may limit flow readings near the
another location.
Potential Imaging Artifacts – Automatic Distance Measurement
Artifact Cause Resolution
Automatic Distance
Measurement is not
proper
The automatic distance measurements
may not always
a trained operator will select. This
algorithm does not replace the operator,
but rather assists in identifying starting
distance measurements within an area
automatic distance
measurement prior to
accepting it. If the distance
measurement is not properly
placed, the operator should
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