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Magnus Cinthio, MSc, PhD. Photo.

Magnus Cinthio

Senior lecturer

Magnus Cinthio, MSc, PhD. Photo.

Spectral Signatures in the Different Layers of the Human Eyelid by Photoacoustic Imaging

Author

  • Ulf Dahlstrand
  • Rafi Sheikh
  • Johanna Berggren
  • Jenny Hult
  • John Albinsson
  • Magnus Cinthio
  • Malin Malmsjö

Summary, in English

BACKGROUND AND OBJECTIVES: The eyelids are susceptible to a number of skin cancers, which are challenging to excise radically without sacrificing excessive healthy tissue. Photoacoustic (PA) imaging is an emerging non-invasive biomedical imaging modality that could potentially be used for intraoperative micrographic control of the surgical margins of eyelid tumors. In this study, non-cancerous human eyelid tissue was characterized using PA as a first step in the development of this technique.

STUDY DESIGN/MATERIALS AND METHODS: Twelve full-thickness samples from nine patients were analyzed ex vivo using PA imaging. Two-dimensional PA images were acquired using 59 wavelengths in the range of 680-970 nm to obtain the spectral signatures of the skin, orbicularis oculi muscle, and the tarsal plate. Three-dimensional images were obtained by scanning the tissues using a linear stepping motor. Spectral unmixing was performed to visualize the chromophore distribution.

RESULTS: The resulting PA spectra could be used to differentiate between the orbicularis oculi muscle and the other two structures (P < 0.05). The signals from the skin and the tarsal plate were more similar in appearance, probably due to similarities in their molecular composition. Spectral unmixing provided a clear visualization of the overall architecture of the eyelids.

CONCLUSIONS: PA imaging can be used to differentiate between the orbicularis oculi muscle and the eyelid skin and tarsal plate. The main structures of human eyelids could be visualized in three dimensions using PA imaging. This technique could potentially be used to examine eyelid tumors intraoperatively in the future. However, further studies on tumors in vivo are needed before considering such clinical use. Lasers Surg Med. © 2019 Wiley Periodicals, Inc.

Department/s

  • Ophthalmology Imaging Research Group
  • Ophthalmology, Lund
  • Clinical Sciences, Helsingborg
  • Department of Biomedical Engineering
  • Clinical and experimental lung transplantation
  • NPWT technology

Publishing year

2019-08-22

Language

English

Publication/Series

Lasers in Surgery and Medicine

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Ophthalmology
  • Biomedical Laboratory Science/Technology

Status

Published

Research group

  • Ophthalmology Imaging Research Group
  • Clinical and experimental lung transplantation
  • NPWT technology

ISBN/ISSN/Other

  • ISSN: 0196-8092