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PubMed · 15134390

Linear arrays for vibro-acoustography: a numerical simulation study.

Glauber T Silva·James F Greenleaf·Mostafa Fatemi
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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 ofvibro-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.

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AcousticsModels, TheoreticalTransducersUltrasonicsVibrationComparative StudyJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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Glauber T Silva, James F Greenleaf, Mostafa Fatemi. 2004. Linear arrays for vibro-acoustography: a numerical simulation study.. https://doi.org/10.1177/016173460402600101

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