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Proceedings Paper

Synthetic sinc wave in ultrasonic imaging system
Author(s): Mok-Kun Jeong; Sung-Jae Kwon
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Paper Abstract

Synthetic sinc wave employs pulsed plane waves as a transmit beam with linear time delay curve. The received echoes in different transmit directions at different transmit times are superposed at imaging points with proper time delay compensation using synthetic focusing scheme. This scheme, which uses full aperture on transmit, obtains a high SNR image, and also features high lateral resolution by using two-way dynamic focusing at all imaging depths. In this paper, we consider the realization problem of the synthetic sinc wave. It is experimentally explored by obtaining phantom and in vivo data with a linear array of 5 MHz. The phantom experiments indicate that the synthetic sinc wave maintains a high resolution over a more extended imaging depth than conventional fixed point transmit and dynamic receive focusing schemes. In vivo images show that the resolution of the synthetic sinc wave does not exceed the conventional focusing systems because of tissue motion, phase aberration, or both, but that the frame rate can be increased by a factor of more than five compared to the conventional focusing schemes, while maintaining competitive resolution at all imaging depths.

Paper Details

Date Published: 23 May 2003
PDF: 10 pages
Proc. SPIE 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing, (23 May 2003); doi: 10.1117/12.479880
Show Author Affiliations
Mok-Kun Jeong, Daejin Univ. (South Korea)
Sung-Jae Kwon, Daejin Univ. (South Korea)

Published in SPIE Proceedings Vol. 5035:
Medical Imaging 2003: Ultrasonic Imaging and Signal Processing
William F. Walker; Michael F. Insana, Editor(s)

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