Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418062
