Algorithms of three-dimensional beam forming for synthetic aperture imaging system using pulses coded with Walsh functions [ultrasonic imaging]

Author

Satoh, Keiichi ; Miura, Masashi ; Tamura, Yasutaka ; Yanagida, Hirotaka ; Yamasaki, Takashi ; Ishihara, Chiaki ; Okada, Nagaya

Author_Institution

Dept. of Informatics, Yamagata Univ., Japan

Volume

2

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

1405

Abstract

An imaging system using coded transmission with Walsh functions has been developed by the authors for high-frame-rate 3D observation. This system enables us to observe a sequence of 3D images of moving objects for each transmission. However, the speed of computation is one of the most important issues in practical applications. In this paper, we describe two algorithms of 3D beam forming for a high-frame-rate synthetic aperture imaging system using transmitting pulses coded with Walsh functions.

Keywords

Walsh functions; image reconstruction; image sequences; modulation coding; ultrasonic imaging; 3D beam forming; 3D image sequence; Walsh function coded pulses; Walsh function modulation; coded transmission imaging system; high-frame-rate 3D observation; image reconstruction; moving object image sequence; synthetic aperture imaging; ultrasonic imaging; Clocks; Equations; Focusing; Frequency; Image reconstruction; Informatics; Optical modulation; Pulse modulation; Transmitters; Ultrasonic imaging;

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.2004.1418062

Filename

1418062