Thermo-elastic optical coherence tomography

Tianshi Wang; Tom Pfeiffer; Wolfgang Wieser; Heleen van Beusekom; Wolfgang Draxinger; Antonius F. W. van der Steen; Robert Huber; Gijs van Soest

doi:10.1117/12.2508852

22 February 2019 Thermo-elastic optical coherence tomography

Tianshi Wang, Tom Pfeiffer, Wolfgang Wieser, Heleen van Beusekom, Wolfgang Draxinger, Antonius F. W. van der Steen, Robert Huber, Gijs van Soest

Author Affiliations +

Proceedings Volume 10867, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII; 108672C (2019) https://doi.org/10.1117/12.2508852
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

The absorption of nanosecond laser pulses induces rapid thermo-elastic deformation in tissue. A sub-micrometer scale displacement occurs within a few microseconds after the pulse arrival. We investigate the thermo-elastic deformation using a 1.5 MHz phase-sensitive optical coherence tomography (OCT) system. An analysis of the results shows that the displacement is dominated by the optical absorption. By tuning the excitation wavelength, thermo-elastic displacement spectrum can be extracted, showing the similar features as optical absorption spectrum. By choosing proper excitation wavelength, targeted tissue type can be highlighted, which further enables a new imaging modality, so called thermo-elastic OCT.

Conference Presentation

Citation Download Citation

Tianshi Wang, Tom Pfeiffer, Wolfgang Wieser, Heleen van Beusekom, Wolfgang Draxinger, Antonius F. W. van der Steen, Robert Huber, and Gijs van Soest "Thermo-elastic optical coherence tomography", Proc. SPIE 10867, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII, 108672C (22 February 2019); https://doi.org/10.1117/12.2508852

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