Spectral doppler flow velocity and doppler angle estimations for small vessel by large sample volume

Ton Tai Pan*, Huihua Kenny Chiang, Bor Ray Lee, Yi Hong Chou, Cheng Deng Kuo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper, we present a Doppler angle and flow velocity estimation method for small vessels by using a large sample volume length. We use the mode frequency, fd, and the -3dB maximum frequency, fmax, to calculate the Doppler angle and flow velocity while keeping the sample volume length larger than the beam path length across the blood vessel. We have successfully implemented this approach in a clinical ultrasound system for measuring a constant and pulsatile flow generated by a UHDC flow phantom in a 4 mm polyethylene tube between 50° and 80° Doppler angle. The standard deviation of the estimated flow velocity is 3.4 cm/s (about 11%) for a constant flow with 23.8 cm/s flow velocity, and is 6 cm/s (about 15%) for a pulsatile flow with 35.8 cm/s peak flow velocity.

Original languageEnglish
Pages (from-to)1401-1404
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume2
DOIs
StatePublished - Oct 2001
Event2001 Ultrasonics Symposium - Atlanta, GA, United States
Duration: 6 Oct 200110 Oct 2001

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