A real-time two-dimensional pulsed-wave Doppler system.
An experimental system was developed to acquire and visualise in real-time two-dimensional (2-D) velocity maps. Data acquisition is performed by using a modified commercial echograph based on a 5-MHz, 128-element linear-array transducer with electronic focussing and beam steering. Additional electronics were integrated into the echograph to implement a 2-D Doppler system capable of measuring the velocity component on the scanning plane. Suitable axial and lateral scanning methods were studied to obtain Doppler measurements over a scanning area. A colour image of the estimated velocity field is presented in real time on a personal computer using different visualisation techniques. The system performance was tested experimentally both in vitro and in vivo on a human carotid artery.
Scabia
M
M
Dipartimento di Ingegneria Elettronica, Florence, Italy.
Calzolai
M
M
Capineri
L
L
Masotti
L
L
Fort
A
A
D001783:Blood Flow Velocity / Q000502:physiology; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging; D004867:Equipment Design; D006801:Humans; D008433:Mathematics; D019047:Phantoms, Imaging; D012212:Rheology; D012815:Signal Processing, Computer-Assisted; D014159:Transducers; D018617:Ultrasonography, Doppler, Pulsed / Q000295:instrumentation / Q000379:methods*