Overview of Ultrasound Imaging Algorithms Based on Synthetic Aperture Focusing Technique

Abstract

Synthetic aperture focusing ultrasound imaging technique used signal processing method to analysis ultrasonic echo data. It let the performance of transducer with small apertures be as well as the transducer with large aperture. It can still obtain high azimuth resolution image and form three-dimensional image, when it was operated at lower operating frequency. This paper describes the history and the theory of synthetic aperture focusing ultrasound imaging technology. It also contains the development of the synthetic aperture focusing ultrasound imaging technology in China and at abroad. And lots of excellent synthetic aperture focusing ultrasound imaging algorithms were listed in this paper. We analyzed the deficiencies and problems of the existing ultrasound focusing algorithms. And we made forecast about the development of synthetic aperture technology in nondestructive testing.

Time Domain/Frequency Domain SAFT Imaging in Thin-Diameter Rod

“…In the work process , it's consist of data acquisition and storage, image reconstruction and data processing.Compared with the technology that directly using the received ultrasonic echo signal for generating the image, Synthetic aperture ultrasound imaging technology is much more complex. The resulting benefits can be applied to small-scale transducer and relatively low operating frequency, to obtain the high resolution of the orientation; During image reconstruction process, It easily apply a variety of image processing technology for the different object imaging, in order to improve the sharpness of the image and signal-to-noise ratio [1][2] .…”