Title :
High-speed 3D imaging system using coded wavefront generated by Walsh function modulated signals
Author :
Tamura, Yasutaka ; Ishihara, Chiaki ; Okada, Nagaya ; Ishii, Norio ; Sato, Masanori ; Aoki, Takashi ; Hisamoto, Takayuki ; Yanagida, Hirotaka
Author_Institution :
Yamagata Univ., Yonezawa, Japan
Abstract :
An experimental ultrasonic three dimensional (3D) imaging system for high-speed data acquisition has been developed. A 3D image can be reconstructed for each transmission of pulses modulated by Walsh functions. Matrix transducers of 40×40 2 MHz elements and a data acquisition system have been developed to evaluate the system performance. In this paper, we describe the principle, the fabrication process of the 2D array, and the data acquisition system. Three dimensional images of 20 dB dynamic ranges were successfully obtained for standard ultrasonic phantoms with 32 transmissions using the developed system.
Keywords :
Walsh functions; biomedical ultrasonics; 2 MHz; 2D array; Walsh function modulated signals; high-speed 3D imaging system; high-speed data acquisition; matrix transducers; Data acquisition; Dynamic range; Fabrication; Image reconstruction; Modulation coding; Pulse modulation; Signal generators; System performance; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
Print_ISBN :
0-7803-7582-3
DOI :
10.1109/ULTSYM.2002.1192626
