Time-efficient and exact algorithms for adaptive temporal stretching and 2D-correlation for elastographic imaging using phase information

Author

Pesavento, A. ; Ermert, H.

Author_Institution

Dept. of Electr. Eng., Ruhr-Univ., Bochum, Germany

Volume

2

fYear

1998

fDate

1998

Firstpage

1765

Abstract

Recently, we developed an algorithm for fast and accurate time shift measurement using an iterative algorithm which calculates the time shift of two signals by iteratively seeking the zero of the phase of the complex correlation function. Typically only 2 or 3 iterations are needed. With this contribution we extended the algorithm to perform an estimation and correction of lateral displacements and adaptive temporal stretching. Both significantly reduce the noise of the strain estimation

Keywords

Newton method; acoustic correlation; adaptive signal processing; biological tissues; biomechanics; biomedical ultrasonics; decorrelation; elasticity; interpolation; medical image processing; motion estimation; 2D-correlation; Newton iteration; adaptive temporal stretching; complex correlation function; decorrelation; elastographic imaging; exact algorithms; homogeneous sponge; interpolation; iterative algorithm; lateral displacements; phase information; phase root seeking; strain estimation noise; time shift; time-efficient algorithms; Algorithm design and analysis; Capacitive sensors; Decorrelation; Delay estimation; Frequency estimation; Interpolation; Iterative algorithms; Phase estimation; Signal analysis; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE

Conference_Location

Sendai

ISSN

1051-0117

Print_ISBN

0-7803-4095-7

Type

conf

DOI

10.1109/ULTSYM.1998.765291

Filename

765291