Title :
A real-time ultrasound time-domain correlation blood flowmeter. II. Performance and experimental verification
Author :
Hein, I.A. ; O´Brien, W.D., Jr.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
For Part I, see ibid., vol.40, no.6, p.768-775 (1993). The performance of a real-time ultrasound time-domain correlation (UTDC) flowmeter employing a high-speed residue number system correlator under various flow conditions for different correlation parameter settings is evaluated. Previous work has incorporated a weighted-averaging scheme to estimate the flow velocity over a wide number of echo signal spacings. The present evaluation indicates that a linear averaging of 50 adjacent echo signal pairs produces equivalent accuracy and precision at real-time processing speed as compared to previous non-real time systems incorporating weighted averaging.<>
Keywords :
biomedical equipment; biomedical measurement; biomedical ultrasonics; correlators; flow measurement; flowmeters; haemodynamics; real-time systems; ultrasonic equipment; UTDC flowmeter; correlation parameter; echo signal spacings; flow velocity; real-time ultrasound time-domain correlation blood flowmeter; residue number system correlator; weighted-averaging scheme; Biomedical acoustics; Blood; Correlators; Fluid flow measurement; Laboratories; Real time systems; Time domain analysis; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
