Hemodynamic imaging with pulsatility-index and resistive-index color Doppler US.
Pulsatility index and resistive index were mapped with color Doppler ultrasound (US) and compared with spectral Doppler US findings. In the carotid arteries and/or kidneys in 12 healthy subjects, the pulsatility index and resistive index were estimated from mean frequency shifts and mapped into "cool-warm" or "rainbow" color scales. Surveys that depicted intervessel variations in a complex vascular field were useful in deciding where to perform spectral Doppler US. Intravessel variations were consistent with fluid dynamic theory.
Lin
G S
GS
Advanced Development Laboratory, Diasonics Ultrasound, Santa Clara, CA 95050-2619, USA.
Spratt
R S
RS
D000293:Adolescent; D000328:Adult; D002339:Carotid Arteries / Q000000981:diagnostic imaging / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011674:Pulse; D012016:Reference Values; D012077:Renal Artery / Q000000981:diagnostic imaging / Q000502:physiology*; D012082:Renal Veins / Q000000981:diagnostic imaging / Q000502:physiology*; D018615:Ultrasonography, Doppler, Color; D014655:Vascular Resistance