Title :
A new Fourier-based multistatic synthetic aperture focusing technique for intravascular ultrasound imaging
Author :
Rastello, T. ; Haas, C. ; Vray, D. ; Krueger, M. ; Schroeder, K. ; Brusseau, E. ; Gimenez, G. ; Ermer, H.
Author_Institution :
CREATIS, CNRS, Villeurbanne, France
Abstract :
Synthetic aperture processing yields an effective lateral resolution for intravascular ultrasound imaging. This processing is generally performed with time domain summation. In this paper, we derive a new synthetic aperture inversion method based on the Fourier domain. The analysis of the image formation shows that the frequency modulation of the PSF could be useful to improve the lateral resolution by matched filtering. Experimental results with a wire phantom show the effectiveness of the inversion and the advantages of the Fourier-based inversion method
Keywords :
Fourier analysis; acoustic signal processing; array signal processing; biomedical ultrasonics; blood vessels; frequency modulation; frequency-domain analysis; image reconstruction; image resolution; matched filters; medical image processing; ultrasonic focusing; Fourier-based inversion method; Fourier-based multistatic; effective lateral resolution; frequency modulation; image formation analysis; image reconstruction; intravascular ultrasound imaging; matched filtering; point spread function; spatial undersampling; synthetic aperture focusing technique; wire phantom; Acoustic scattering; Delay; Focusing; Frequency; Image analysis; Image resolution; Image sampling; RF signals; Spatial resolution; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.765282
