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	Design of weights based on the virtual array transformation of uniform circular array for ultrasound imaging
	Zhang, Yang ; Li, Zhaohui
	2014
英文摘要	In applications such as endoscopic ultrasound imaging, uniform circular arrays (UCAs) are attractive since they are naturally suited to offer 360 degrees of coverage in azimuth. The design of aperture weights for beamforming is a crucial step in the development of ultrasound imaging system. However, the conventional weighting functions, known for their interference rejection capabilities, are mostly suitable for uniform linear arrays. They are not optimal for UCAs. In this paper, a virtual array transformation technique is proposed to design the weights for the beamformer of UCAs. The main idea is transforming UCAs into virtual nonunifonn linear arrays. By using the positions of the virtual linear array elements, suitable weights of the UCA are obtained from conventional weighting functions. And the process has very low complexity. The simulation results demonstrate that the designed weights have a better performance than the conventional weighting functions on the aspects of the sidelobe control of beampattem and the contrast of image. ? 2014 IEEE.; EI; October; 377-382; 2015-January
语种	英语
出处	2014 12th IEEE International Conference on Signal Processing, ICSP 2014
DOI标识	10.1109/ICOSP.2014.7015032
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/423783]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhang, Yang,Li, Zhaohui. Design of weights based on the virtual array transformation of uniform circular array for ultrasound imaging. 2014-01-01.

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