Papers by Keyword: Ultrasound Imaging

Abstract: Jian-yu Lu has studied a high frame rate (HFR) ultrasound imaging system since 1997. In the system, weighting echo signal by limited diffraction beam spends most of the computing time of imaging algorithm. In the paper the spectrum of HFR ultrasound imaging is analyzed. Combining limited bandwidth properties of image spectrum and the plane wave characteristics of limited diffraction wave, a method, which can improve the efficiency of weighted processing algorithms, is put forward. Simulation results show that it effectively reduces the calculation amount of weighting, meanwhile maintaining image quality.

Abstract: Drug loaded PLA (or PLGA) mirobubbles that combine properties of ultrasound imaging contrast agents and drug carriers suffer from low encapsulation efficiency and difficulty to destruction with diagnosis ultrasound. In this paper, a new type of multifunctional paclitaxel-loaded poly lactide-lecithin (PLA-lecithin) microbubbles has been developed with a method of ultrasonic double emulsion solvent evaporation (UDES) combined with lyophilization, and single-factor of ultrasonic time was studied to influence bubble size and drug loading efficiency. Bubbles were characterized to be well dispersed, with size of 300nm~2um, and showed increased ultrasound imaging on rabbit liver and heart after intravenous injection.

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.

Abstract: Industrial ultrasonic imaging system based on compressed sensing(IUICS),is still lack of available implementation, due to its difficulty in hardware realization.However,thanks to the recent finite rate of innovation and ultrasonic phased array technology,it is possible to apply Compressive Sensing framework to industrial ultrasonic imaging system.In this paper,we propose an available scheme of industrial ultrasonic imaging,which includes the sampling of signal,reconstruction algorithm and its physical structure, based on Compressed Sensing.