A configurable dual-frequency transmit/receive system for acoustic angiography imaging

Author

Yang Li ; Jianguo Ma ; Martin, Karl H. ; Hojong Choi ; Dayton, Paul A. ; Xiaoning Jiang ; Shung, K. Kirk ; Qifa Zhou

Author_Institution

Dept. of Biomed. Eng., Univ. of Southern California, Los Angeles, CA, USA

fYear

2014

fDate

3-6 Sept. 2014

Firstpage

731

Lastpage

733

Abstract

Acoustic angiography is a high-resolution imaging modality for small vascular structure. It utilizes the nonlinear backscatter of microbubble contrast agents (MCAs) to delineate blood vessels. In acoustic angiography, where MCAs are insonified with high rarefractional pressures at resonance frequency (6.5MHz), high-order harmonics (30 MHz) become more evident and can be utilized to produce high-resolution images for detecting small vascular structures. We developed a configurable dual-frequency system platform dedicated to acoustic angiography. The system consists of pulse generation, data acquisition and signal processing blocks. It is controlled by a field programmable gate array (FPGA), which enables flexible programming, and many on-board processing and stimulation modes. The system was shown to be capable of acoustic angiography as well as traditional B-mode imaging.

Keywords

biomedical transducers; biomedical ultrasonics; blood vessels; data acquisition; digital signal processing chips; field programmable gate arrays; medical signal processing; ultrasonic transducers; FPGA; MCA nonlinear backscatter; acoustic angiography imaging; blood vessel delineation; configurable dual frequency system platform; configurable dual frequency transmit-receive system; data acquisition block; field programmable gate array; frequency 30 MHz; frequency 6.5 MHz; high order harmonics; high rarefractional pressure insonation; high resolution images; high resolution imaging modality; microbubble contrast agents; pulse generation block; resonance frequency; signal processing block; small vascular structure; traditional B-mode imaging; Acoustics; Angiography; Bandwidth; Field programmable gate arrays; Transducers; Ultrasonic imaging; FPGA; acoustic angiography; configurable system; contrast imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2014 IEEE International

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/ULTSYM.2014.0180

Filename

6932145