Experimental comparisons of the impact of abdominal wall aberrators on linear and nonlinear beam patterns

Author

Wallace, Kirk D. ; Robinson, Brent S. ; Holland, Mark R. ; Rielly, Matthew R. ; Miller, James G.

Author_Institution

Dept. of Phys., Washington Univ., St. Louis, MO, USA

Volume

2

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

866

Abstract

An ultrasonic wavefront can suffer significant aberration as it passes through the abdominal or chest wall. The present work experimentally measures the impact of phase and amplitude aberrations resulting from an inhomogeneous tissue path on: the fundamental (1f), the nonlinearly generated second harmonic (2f), and the effective apodization signal, linearly propagated at the same (2f) frequency. While the nonlinearly generated second harmonic beam is found to be relatively more degraded by the aberration than the fundamental, it remains more compact.

Keywords

biological tissues; biomedical ultrasonics; harmonics; medical image processing; ultrasonic imaging; ultrasonic propagation; abdominal wall aberrators; amplitude aberrations; effective apodization signal; fundamental frequency; inhomogeneous tissue path; linear beam patterns; linear propagation; nonlinear beam patterns; nonlinearly generated second harmonic; phase aberrations; ultrasonic wavefront; Abdomen; Apertures; Degradation; Frequency measurement; Muscles; Phase measurement; Shape measurement; Skin; Ultrasonic imaging; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2004 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-8412-1

Type

conf

DOI

10.1109/ULTSYM.2004.1417872

Filename

1417872