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Title: A delayed-excitation data acquisition method for high-frequency ultrasound imaging
Authors: Qiu, W
Xia, J
Shi, Y
Mu, P
Wang, X
Gao, M
Wang, C
Xiao, Y
Yang, G
Liu, J
Sun, L 
Zheng, H
Keywords: High-frequency ultrasound
Imaging system
Delayed excitation
Emulated sampling rate
Compatible system
Issue Date: Jan-2018
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on biomedical engineering, 2018, v. 65, no. 1, p. 15-20 How to cite?
Journal: IEEE transactions on biomedical engineering 
Abstract: High-frequency ultrasound imaging (at >20 MHz) has gained widespread attention due to its high spatial resolution being useful for basic cardiovascular and cancer research involving small animals. The sampling rate of the analog-to-digital converter in a high-frequency ultrasound system usually needs to be higher than 120 MHz in order to satisfy the Nyquist sampling-rate requirement. However, the sampling rate is typically within the range of 40–60 MHz in a traditional ultrasound system, and so we propose a delayed-excitation method for performing high-frequency ultrasound imaging with a traditional data acquisition scheme. In this method, the transmitted pulse is delayed by a certain time period so that the ultrasound echo data are aligned into high-sampling-rate slots. Wire and tissue-mimicking phantoms were imaged to evaluate the performance of the proposed method, while a porcine small-intestine specimen and an excised rabbit eyeball were used for in vitro imaging evaluations. The test results demonstrate that the proposed method allows high-frequency ultrasound imaging to be implemented using a traditional ultrasound sampling system.
ISSN: 0018-9294
EISSN: 1558-2531
DOI: 10.1109/TBME.2017.2687948
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