Adaptive inverse filtering with chirp for medical ultrasound

Author

Shyam, Venkatraman ; Rao, N. A H K

Author_Institution

Center for Imaging Sci., Rochester Inst. of Technol., NY, USA

Volume

1

fYear

1995

fDate

20-25 Sep 1995

Firstpage

617

Abstract

In medical ultrasound imaging, the axial resolution is limited by the bandwidth of the transducer. In a linear frequency modulation (chirp) pulse coding technique for imaging, it is possible to inverse modulate the chirp amplitude by a function adaptively derived from the transducer frequency response. The transducer output then becomes an equalized chirp with a wider effective bandwidth. Subsequent pulse compression processing consequently improves the resolution. This concept has been evaluated experimentally in this paper

Keywords

acoustic signal processing; adaptive signal processing; biomedical ultrasonics; image resolution; medical image processing; pulse compression; adaptive inverse filtering; axial resolution; chirp pulse; effective bandwidth; equalized chirp; linear frequency modulation pulse; medical diagnostic imaging; pulse compression processing; transducer bandwidth; transducer frequency response; transducer output; Adaptive filters; Bandwidth; Biomedical imaging; Biomedical transducers; Chirp modulation; Filtering; Image resolution; Pulse modulation; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-2475-7

Type

conf

DOI

10.1109/IEMBS.1995.575278

Filename

575278