Frequency domain compensation for inhomogeneous layers in ultrasound holography

Author

Qin, Z.D. ; Tauriainen, Antti ; Ylitalo, Juha ; Alasaarela, Esko ; Lü, Weixue

Author_Institution

Dept. of Electr. Eng., Oulu Univ., Finland

Volume

36

Issue

1

fYear

1989

Firstpage

73

Lastpage

78

Abstract

A frequency-domain compensation method is presented that is based on the ultrasound holography B-scan (UHB) imaging principle. In an acoustic imaging system, the wavefront-angle-dependent distortions caused by any kind of known inhomogeneous reason can be compensated by this method. It is applied here in the frequency domain using the so-called rear-ranging operation for the longitudinal distortion and the multiplication of phase factors for the lateral distortion. The method is especially suitable for compensating different velocity layers in acoustic imaging systems. The results of both computer simulations and water-tank experiments are promising.<>

Keywords

acoustic holography; acoustic imaging; ultrasonic applications; B-scan; acoustic imaging; frequency-domain compensation; inhomogeneous layers; rear-ranging; ultrasound holography; velocity layers; Acoustic distortion; Acoustic imaging; Biological tissues; Frequency domain analysis; Holography; Image resolution; Phase distortion; Ultrasonic imaging; Ultrasonic transducers; Underwater acoustics;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.16971

Filename

16971