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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3014–3017

Optical palpation: optical coherence tomography-based tactile imaging using a compliant sensor

Kelsey M. Kennedy, Shaghayegh Es’haghian, Lixin Chin, Robert A. McLaughlin, David D. Sampson, and Brendan F. Kennedy  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 3014-3017 (2014)
http://dx.doi.org/10.1364/OL.39.003014


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Abstract

We present optical palpation, a tactile imaging technique for mapping micrometer- to millimeter-scale mechanical variations in soft tissue. In optical palpation, a stress sensor consisting of translucent, compliant silicone with known stress–strain behavior is placed on the tissue surface and a compressive load is applied. Optical coherence tomography (OCT) is used to measure the local strain in the sensor, from which the local stress at the sample surface is calculated and mapped onto an image. We present results in tissue-mimicking phantoms, demonstrating the detection of a feature embedded 4.7 mm below the sample surface, well beyond the depth range of OCT. We demonstrate the use of optical palpation to delineate the boundary of a region of tumor in freshly excised human breast tissue, validated against histopathology.

© 2014 Optical Society of America

OCIS Codes
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(170.6935) Medical optics and biotechnology : Tissue characterization

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: March 6, 2014
Manuscript Accepted: March 25, 2014
Published: May 14, 2014

Virtual Issues
Vol. 9, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Kelsey M. Kennedy, Shaghayegh Es’haghian, Lixin Chin, Robert A. McLaughlin, David D. Sampson, and Brendan F. Kennedy, "Optical palpation: optical coherence tomography-based tactile imaging using a compliant sensor," Opt. Lett. 39, 3014-3017 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3014


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References

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