A delayed-excitation data acquisition method for high-frequency ultrasound imaging

Weibao Qiu, Jingjing Xia, Yulong Shi, Peitian Mu, Xingying Wang, Mengdi Gao, Congzhi Wang, Yang Xiao, Ge Yang, Jihong Liu, Lei Sun, Hairong Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

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 thismethod, 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, whereas 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.
Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalIEEE Transactions on Biomedical Engineering
Volume65
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Compatible system
  • Delayed excitation
  • Emulated sampling rate
  • High-frequency ultrasound
  • Imaging system

ASJC Scopus subject areas

  • Biomedical Engineering

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