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Ultrasound field characterisation in air using light diffraction tomography

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Author

Summary, in English

The aim of this work was to show the applicability of light diffraction tomography on airborne ultrasound. Different air-coupled transducers in the frequency range 40 kHz - 2 MHz were measured to show the method's performance. A calibrated microphone and the pulse-echo method were used to evaluate the results. The absolute measurements agreed within the calibrated microphone's uncertainty range. Pulse waveforms and corresponding FFT-diagrams show the method's higher bandwidth compared to the microphone. Further, the method offers non-perturbing measurements with high spatial resolution, which was especially advantageous for measurements close to the transducer surfaces. The S/N-ratio was larger than or in the same range as that of the two comparing methods.

Publishing year

2004

Language

English

Pages

150-154

Publication/Series

AMUM 2004: Advanced Metrology for Ultrasound in Medicine 2004

Volume

1

Document type

Conference paper

Publisher

IOP Publishing

Topic

  • Medical Engineering

Conference name

Conference on Advanced Metrology for Ultrasound in Medicine (AMUN 2004)

Conference date

2004-04-27 - 2004-04-28

Status

Published

ISBN/ISSN/Other

  • ISSN: 1742-6588
  • ISSN: 1742-6596