Color and pulsed wave doppler sonograms of normal lower extremity arteries with parameters. top: in a color image of a pulsed wave doppler sonogram, the color box is tilted to be parallel to the arterial axis using the “steer” key. A standard duplex ultrasound system with high resolution b mode imaging, pulsed doppler spectral waveform analysis, and color flow doppler imaging is adequate for scanning lower extremity arteries. a variety of transducers are often needed for a complete lower extremity arterial duplex examination. low frequency (2 or 3 mhz) transducers are.
Noninvasive spectral doppler waveform assessment is a principal diagnostic tool used in the diagnosis of arterial and venous disease states. with 200 million people affected by peripheral artery disease worldwide 1,2 and >600 000 hospital admissions yearly for venous thromboembolic disease in the united states, 3,4 establishment and adoption of nomenclature for spectral doppler waveform. Color and pulsed wave doppler sonograms of normal lower extremity arteries with parameters. top: in a color image of a pulsed wave doppler sonogram, the color box is tilted to be parallel to the arterial axis using the “steer” key. Duplex ultrasound technique. similar to other arterial applications of duplex scanning, the lower extremity assessment relies on high quality b mode imaging to identify the artery of interest and facilitate precise placement of the pulsed doppler sample volume for spectral waveform analysis. 9 both color flow and power doppler imaging provide important flow information to guide spectral. Duplex us uses the combination of gray scale (b mode) for vessel morphology and color pulsed wave doppler techniques. it is safe, inexpensive, and can provide functional information about vessel stenosis. 4 the primary criteria of intra arterial peak systolic velocity (psv) and ratio of psv between the site of stenosis and adjacent normal.
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