![[IMAGE]](carotdop.gif)
Duplex scanning has been proven to be an effective and accurate means of
identifying the degree of atherosclerosis in the carotid arteries. The
addition of color has enhanced its capability, improved accuracy and is
essential for direction of flow and turbulence. For the technologist to
efficiently perform this evaluation knowledge of cerebrovascular anatomy,
physiology and Doppler physics and principles is essential.
Duplex scanning with spectral analysis is a well documented and well-accepted
testing modality for identifying the degree of atherosclerosis in the carotid
bifurcation. The addition of color imaging offers a new dimension to the
routine duplex examination currently being performed in most diagnostic
laboratories. The color display allows a more rapid identification of the
vessels and flow patterns. Therefore, it provides a road map for the anatomy
and for the correct placement of the single gate pulsed Doppler for point
velocity sampling. An accurate recording of velocity changes via spectral
waveform analysis continues to be the best criterion for documenting the
extent of disease in the carotid bifurcation.
