Adaptive clutter filtering via blind signal separation for lateral blood velocity measurement

Author

Gallippi, Caterina M. ; Trahey, Gregg E.

Author_Institution

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

Volume

2

fYear

2002

fDate

8-11 Oct. 2002

Firstpage

1517

Abstract

A method for adaptive clutter rejection via blind signal separation (BSS) is presented in application to angle-independent blood velocity measurement in the carotid artery. Clutter filtering via frequency domain-based approaches is ineffective given short ensemble lengths and/or overlapping axial wall and lateral blood frequency spectra. Rather than operating in the frequency domain, BSS decomposes the input data ensemble into source signals in time. The method is demonstrated using Field II simulated and clinical examples of flow in the common carotid artery. In addition to clutter rejection, the BSS technique is presented for detection of small axial flow components and filtering acoustic radiation force impulse (ARFI) displacement profiles.

Keywords

adaptive filters; biomedical ultrasonics; blind source separation; blood flow measurement; clutter; frequency-domain analysis; velocity measurement; adaptive clutter filtering; angle-independent blood velocity measurement; blind signal separation; carotid artery; filtering acoustic radiation force impulse displacement profiles; input data ensemble; lateral blood velocity measurement; overlapping axial wall; Acoustic pulses; Adaptive filters; Biomedical measurements; Blind source separation; Blood flow; Carotid arteries; Filtering; Finite impulse response filter; Frequency; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-7582-3

Type

conf

DOI

10.1109/ULTSYM.2002.1192585

Filename

1192585