TY - JOUR
T1 - Spectral doppler flow velocity and doppler angle estimations for small vessel by large sample volume
AU - Pan, Ton Tai
AU - Chiang, Huihua Kenny
AU - Lee, Bor Ray
AU - Chou, Yi Hong
AU - Kuo, Cheng Deng
PY - 2001/10
Y1 - 2001/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0035729063&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2001.991983
DO - 10.1109/ULTSYM.2001.991983
M3 - Conference article
AN - SCOPUS:0035729063
SN - 1051-0117
VL - 2
SP - 1401
EP - 1404
JO - Proceedings of the IEEE Ultrasonics Symposium
JF - Proceedings of the IEEE Ultrasonics Symposium
T2 - 2001 Ultrasonics Symposium
Y2 - 6 October 2001 through 10 October 2001
ER -