Title :
A 3×3 matrix beam-former of partially overlapping beams using a 1.5D array for real time cross-correlation imaging (CCI)
Author :
Schmitt, R.M. ; Scott, W.G. ; Fowlkes, J.B. ; Kripfgans, O.D. ; Irving, R. ; Rubin, J.M. ; Carson, P.L.
Author_Institution :
Winprobe Inc., Ann Arbor, MI, USA
Abstract :
Out of plane displacement is a major source of error in quantitative blood flow and elasticity imaging. The use of a 1.5 matrix array is investigated forming a 3×3 matrix of partially overlapping beams allowing us to estimate the 3D displacement vector from increase and decrease of cross-correlation between appropriate segments of the partially overlapping beams and subsequent firings. This contribution explores the translated aperture approach forming the elevation aperture of the beam matrix. It is shown numerically using field II for beam pattern calculation and by simulating the two way array response and the resulting wave propagation using the FE-code Pzflex that at least 12 rows are required for the anticipated task.
Keywords :
array signal processing; biomedical ultrasonics; correlation methods; elasticity; finite element analysis; haemodynamics; ultrasonic arrays; ultrasonic imaging; ultrasonic propagation; 1.5 matrix array; 1.5D array; 3Φ3 matrix beam-former; Pzflex FE-code; beam pattern calculation; elasticity imaging; elevation aperture; field II; out of plane displacement; partially overlapping beams; quantitative blood flow; real time cross-correlation imaging; translated aperture; two way array response; wave propagation; Acoustic beams; Acoustic scattering; Apertures; Blood flow; Capacitive sensors; Frequency estimation; Hardware; Image segmentation; Radiofrequency interference; Structural beams;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418023
