Linear arrays for vibro-acoustography: A numerical simulation study

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Abstract

In this work, we study linear array beamforming for vibro-acoustography systems. The goal of this research is to assess the feasibility of vibro-acoustography imaging systems based on linear arrays for clinical applications. The vibro-acoustography transducer is designed with two arrays driven by two continuous-wave or tone-burst signals at slightly different frequencies. The system beamforming is modeled in a homogeneous and lossless fluid. In this model, the point-spread function (psf) of the system is obtained as the product of the spatial impulse function of each linear array. Three linear array configurations are analyzed for vibro-acoustography systems. Simulations considering 64 elements in each array are performed. Aspects related to clinical applications of vibro-acoustography, such as system spatial resolution, sidelobes, grating lobes and image frame-rate are discussed. It is concluded that linear array transducers can produce acceptable spatial resolution for clinical applications.

Original languageEnglish (US)
Pages (from-to)1-17
Number of pages17
JournalUltrasonic Imaging
Volume26
Issue number1
DOIs
StatePublished - Jan 2004

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Keywords

  • Linear arrays
  • Medical imaging
  • Radiation force
  • Ultrasound
  • Vibro-acoustography

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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