Large area robotically assisted optical coherence tomography (LARA-OCT) for skin imaging with MHz-OCT surface tracking

Abstract

Optical coherence tomography (OCT) is a powerful imaging technique to non-invasively differentiate between healthy skin and pathological conditions. Unfortunately, commercially available OCT-systems are typically slow and not capable of scanning large areas at reasonable speed. Since skin lesions may extend over several square centimeters, potential inflammatory infiltrates remain undetected. Here, we present large area robotically assisted OCT (LARA-OCT) for skin imaging. Therefor a collaborative robot is combined with an existing, home-built 3.3 MHz-OCT-system and for surface tracking an online probe-to-surface control is implemented which is solely based on the OCT surface signal. It features a combined surface-distance and surface-orientation closed-loop control algorithm, which enables automatic positioning and alignment of the probe across the target while imaging. This allows to acquire coherent OCT images of skin areas beyond 10 cm2.
Original languageEnglish
Title of host publicationOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII
EditorsJoseph A. Izatt, James G. Fujimoto
Volume12367
PublisherSPIE
Publication date08.03.2023
Pages123670C
DOIs
Publication statusPublished - 08.03.2023

Research Areas and Centers

  • Academic Focus: Biomedical Engineering
  • Centers: Center for Research on Inflammation of the Skin (CRIS)

DFG Research Classification Scheme

  • 205-32 Medical Physics, Biomedical Engineering
  • 205-19 Dermatology

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