Second harmonic acoustic responses induced in matter by quasi continuous radiofrequency fields

Stephan Kellnberger; Murad Omar; George Sergiadis; Vasilis Ntziachristos

doi:10.1063/1.4824709

Second harmonic acoustic responses induced in matter by quasi continuous radiofrequency fields

Stephan Kellnberger, Murad Omar, George Sergiadis, Vasilis Ntziachristos

Chair of Biological Imaging

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We subjected conductive matter and tissue to intermittent continuous-wave radiofrequency fields and investigated whether acoustic responses could be recorded. By placing samples in the near-field of the excitation, we observed frequency-domain acoustic responses from tissues responding to CW radiofrequency excitation. Frequency analysis revealed the generation of 2nd harmonic mechanical waves. This discovery of non-linear responses can lead to alternative measurement concepts of CW radiofrequency deposition in matter and tissues. We offer the theoretical mainframe and discuss sensing applications involving the direct measurement of second harmonic responses representative of CW RF energy deposition in matter.

Original language	English
Article number	153706
Journal	Applied Physics Letters
Volume	103
Issue number	15
DOIs	https://doi.org/10.1063/1.4824709
State	Published - 7 Oct 2013

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abstract = "We subjected conductive matter and tissue to intermittent continuous-wave radiofrequency fields and investigated whether acoustic responses could be recorded. By placing samples in the near-field of the excitation, we observed frequency-domain acoustic responses from tissues responding to CW radiofrequency excitation. Frequency analysis revealed the generation of 2nd harmonic mechanical waves. This discovery of non-linear responses can lead to alternative measurement concepts of CW radiofrequency deposition in matter and tissues. We offer the theoretical mainframe and discuss sensing applications involving the direct measurement of second harmonic responses representative of CW RF energy deposition in matter.",

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AB - We subjected conductive matter and tissue to intermittent continuous-wave radiofrequency fields and investigated whether acoustic responses could be recorded. By placing samples in the near-field of the excitation, we observed frequency-domain acoustic responses from tissues responding to CW radiofrequency excitation. Frequency analysis revealed the generation of 2nd harmonic mechanical waves. This discovery of non-linear responses can lead to alternative measurement concepts of CW radiofrequency deposition in matter and tissues. We offer the theoretical mainframe and discuss sensing applications involving the direct measurement of second harmonic responses representative of CW RF energy deposition in matter.

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Second harmonic acoustic responses induced in matter by quasi continuous radiofrequency fields

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