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Ultrasound field characterisation in air using light diffraction tomography

In English

Författare

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.

Publiceringsår

2004

Språk

Engelska

Sidor

150-154

Publikation/Tidskrift/Serie

AMUM 2004: Advanced Metrology for Ultrasound in Medicine 2004

Volym

1

Dokumenttyp

Konferensbidrag

Förlag

IOP Publishing

Ämne

  • 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/Övrigt

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