Harmonic imaging: a model for ultrasonic speckle reduction

Author

Hokland, J.H. ; Taxt, Torfinn

Author_Institution

Dept. of Physiol., Bergen Univ.

fYear

1993

fDate

31 Oct-3 Nov 1993

Firstpage

1005

Abstract

We present a speckle reduction method called Harmonic Imaging (HI). It is derived from a multi component scattering model for biological tissues. The backscattered ultrasound quadrature signal is modeled as the sum of three components after demodulation. The first component represents nonresolvable diffuse scatterers, the second subresolvable quasiperiodic scatterers, and the third resolvable quasiperiodic scatterers and mirroring surfaces. The HI images produced using radio frequency data from a phantom and from tissues in vivo are more blurred than ordinary envelope images, but the signal to noise ratio and tissue contrast were higher for the HI images

Keywords

backscatter; biomedical ultrasonics; speckle; ultrasonic scattering; backscattered ultrasound quadrature signal; diffuse scatterers; harmonic imaging; in vivo; mirroring surfaces; multi component scattering model; phantom; quasiperiodic scatterers; signal to noise ratio; tissues; ultrasonic speckle reduction; Biological system modeling; Biological tissues; Demodulation; Imaging phantoms; In vivo; Radio frequency; Scattering; Signal resolution; Speckle; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1993. Proceedings., IEEE 1993

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1993.339638

Filename

339638