Title :
A real-time ultrasound time-domain correlation blood flowmeter. I. Theory and design
Author :
Hein, I.A. ; Chen, J.T. ; Jenkins, W.K. ; O´Brien, W.D., Jr.
Author_Institution :
Illinois Univ., Urbana, IL, USA
Abstract :
A real-time ultrasound time-domain correlation (UTDC) blood flowmeter has been developed. Real-time performance has been achieved through the implementation of a custom-designed high-speed residue-number system (RNS) hardware correlator. The flowmeter is interfaced to a commercial ultrasound imager and can produce one-dimensional velocity versus range graphs at a rate of three per second. It has been validated in a blood flow phantom under a variety of conditions along with in vivo measurements in the human carotid artery. The theory of the time-domain correlation technique, design and implementation of flowmeter hardware, and the important correlation parameters which affect the performance of the flowmeter are described.<>
Keywords :
biomedical equipment; biomedical measurement; biomedical ultrasonics; correlators; flow measurement; flowmeters; haemodynamics; real-time systems; ultrasonic equipment; RNS hardware correlator; UTDC blood flowmeter; blood flow phantom; commercial ultrasound imager; correlation parameters; custom designed residue number system hardware correlator; flowmeter hardware; human carotid artery; in vivo measurements; one-dimensional velocity; real-time ultrasound time-domain correlation blood flowmeter; Blood flow; Correlators; Fluid flow measurement; Hardware; Imaging phantoms; In vivo; Real time systems; Time domain analysis; Ultrasonic imaging; Ultrasonic variables measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
