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

Kelsey Kennedy, Shaghayegh Es'Haghian, Lixin Chin, Robert Mclaughlin, David Sampson, Brendan Kennedy

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    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.
    Original languageEnglish
    Pages (from-to)3014-3017
    JournalOptics Letters
    Volume39
    Issue number10
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    Dive into the research topics of 'Optical palpation: Optical coherence tomography-based tactile imaging using a compliant sensor'. Together they form a unique fingerprint.

    Cite this