Rotational magneto-acousto-electric tomography (MAET): Theory and experimental validation

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Abstract

We present a novel two-dimensional (2D) MAET scanner, with a rotating object of interest and two fixed pairs of electrodes. Such an acquisition scheme, with our novel reconstruction techniques, recovers the boundaries of the regions of constant conductivity uniformly well, regardless of their orientation. We also present a general image reconstruction algorithm for the 2D MAET in a circular chamber with point-like electrodes immersed into the saline surrounding the object. An alternative linearized reconstruction procedure is developed, suitable for recovering the material interfaces (boundaries) when a non-ideal piezoelectric transducer is used for acoustic excitation. The work of the scanner and the linearized reconstruction algorithm is demonstrated using several phantoms made of high-contrast materials and a biological sample.

Original languageEnglish (US)
Pages (from-to)3025-3050
Number of pages26
JournalPhysics in Medicine and Biology
Volume62
Issue number8
DOIs
Publication statusPublished - Mar 21 2017

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Keywords

  • electric impedance tomography
  • imaging of conductivity
  • lead currents
  • Lorentz force tomography
  • magneto-acousto-electric tomography
  • synthetic transducer

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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