Localization of nerve fiber bundles by polarization-sensitive optical coherence tomography

Haruo Nakaji, Nobuo Kouyama, Yoshihiro Muragaki, Yoriko Kawakami, Hiroshi Iseki

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Diagnostic modalities that can distinguish brain tumors from eloquent cortices or nerve fiber bundles are important for neurosurgery. For identifying nerve fiber bundles, various techniques such as diffusion tensor imaging and subcortical stimulation mapping have been used. In this article, we propose localization of nerve fiber bundles by polarization-sensitive optical coherence tomography (PS-OCT) for the first time. PS-OCT performs tomographic imaging by measuring the travel distance and the change in polarization of the backscattered light from the tissue at different traverse positions, enabling selective visualization of birefringent tissues such as nerve fiber bundles. We examined the imaging of nerve fiber bundles in blocks of fixed rat brains. Nerve fiber bundles in internal and external capsules of the rat brains appearing on the surfaces of the coronal, horizontal, and sagittal planes were identified as to their locations and orientations. The nerve fiber bundles were clearly visualized by PS-OCT. The image penetration depth of the PS-OCT images was about 1.0 mm in gray matter and about 0.5 mm in white matter, so the refractive indices of gray and white matters were assumed to be 1.4.

Original languageEnglish
Pages (from-to)82-90
Number of pages9
JournalJournal of Neuroscience Methods
Volume174
Issue number1
DOIs
Publication statusPublished - 2008 Sep 15
Externally publishedYes

Fingerprint

Optical Coherence Tomography
Nerve Fibers
Internal Capsule
Refractometry
Diffusion Tensor Imaging
Brain
Neurosurgery
Brain Neoplasms
Light

Keywords

  • Central nervous fibers
  • Fiber mapping
  • Imaging
  • Optical coherence tomography
  • Polarization

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Localization of nerve fiber bundles by polarization-sensitive optical coherence tomography. / Nakaji, Haruo; Kouyama, Nobuo; Muragaki, Yoshihiro; Kawakami, Yoriko; Iseki, Hiroshi.

In: Journal of Neuroscience Methods, Vol. 174, No. 1, 15.09.2008, p. 82-90.

Research output: Contribution to journalArticle

Nakaji, Haruo ; Kouyama, Nobuo ; Muragaki, Yoshihiro ; Kawakami, Yoriko ; Iseki, Hiroshi. / Localization of nerve fiber bundles by polarization-sensitive optical coherence tomography. In: Journal of Neuroscience Methods. 2008 ; Vol. 174, No. 1. pp. 82-90.
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