Andrew J. Winkler
Junru Wu
Dept. of Phys., Univ. of Vermont, Burlington, VT 05405
Commercial Duplex ultrasound systems primarily measure peak velocity of
blood flow to provide information in diagnosing vascular disease. However, due
to errors caused by intrinsic spectral broadening (ISB), the accuracy decreases
as Doppler angle increases. In general, vascular technologists keep the Doppler
angle under 60(degrees). Since most vessels in the body run almost parallel
with the skin surface, any criteria requiring a Doppler angle of say
45(degrees) or less would be difficult to achieve. Using the transverse Doppler
equation [Newhouse et al.,