Synthetic aperture-based beam compression for intravascular ultrasound imaging.
In this paper, intravascular ultrasound (IVUS) images acquired with a 64-element array transducer using a multistatic acquisition scheme are presented. The images are reconstructed from a collection of pulse-echo measurements using a synthetic aperture array imaging technique. The main limitations of IVUS imaging are a poor lateral resolution and elevated grating lobes caused by the imaging geometry. We propose a Synthetic Aperture Focusing Technique (SAFT), which uses a limited number of A-scan signals. The focusing process, which is performed in the Fourier domain, requires far less computation time than conventional delay-and-sum methods. Two different reconstruction kernel functions have been derived and are compared for the processing of experimental data.
Vray
D
D
CREATIS, 69621 Villeurbanne, France. didier.vray@creatis.insa-lyon.fr
Haas
C
C
Rastello
T
T
Krueger
M
M
Brusseau
E
E
Schroeder
K
K
Gimenez
G
G
Ermert
H
H
D003198:Computer Simulation; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005583:Fourier Analysis; D006801:Humans; D008955:Models, Cardiovascular; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*