Real time adaptive imaging with 1.75D, high frequency arrays

Author

McAleavey, Stephen A. ; Dahl, Jeremy J. ; Pinton, Gianmarco F. ; Trahey, Gregg E.

Author_Institution

Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA

Volume

1

fYear

2003

fDate

5-8 Oct. 2003

Firstpage

335

Abstract

We have created a system for real-time phase aberration correction functional with a 7.5 MHz, 1×192 element 1D linear array (Siemens) and a 9.5 MHz, 8×96 element, 1.75D linear array (Tetrad), using a Siemens Antares scanner. Aberration profiles are estimated with a weighted least squares algorithm. The calculated aberration profiles are used to modify the transmit and receive phasing of array elements. The present implementation requires 0.6 seconds for transmit and receive correction with the 1×192 array, 1.0 second for receive-only correction on with 8×96 array, and 1.5 seconds for transmit and receive correction with the 8×96 array. We present aberrated and corrected images of speckle target phantoms produced with one- and two-dimensional physical aberrators for both arrays.

Keywords

aberrations; biomedical imaging; phantoms; speckle; ultrasonic arrays; ultrasonic imaging; 0.6 sec; 1 sec; 1.5 sec; 1D linear array; 7.5 MHz; 9.5 MHz; Siemens Antares scanner; aberrators; high frequency arrays; real time adaptive imaging; real time phase aberration correction function; receive correction; speckle target phantoms; transmit correction; weighted least squares algorithm; Adaptive arrays; Biomedical imaging; Biomedical transducers; Delay; Focusing; MATLAB; Phased arrays; Radio frequency; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics, 2003 IEEE Symposium on

Print_ISBN

0-7803-7922-5

Type

conf

DOI

10.1109/ULTSYM.2003.1293417

Filename

1293417