We describe a miniature optical coherence tomography (OCT) imaging needle that can be inserted into solid tissues and organs to permit interstitial imaging of their internal microstructures with micrometer scale resolution and minimal trauma. A novel rotational coupler with a glass capillary tube is also presented that couples light from a rotating single-mode fiber to a stationary one. A prototype needle with a 27-gauge (∼410-μm) outer diameter has been developed and is demonstrated for <i>in vivo</i> imaging. The OCT needle can be integrated with standard excisional biopsy devices and used for OCT-guided biopsy.
© 2000 Optical Society of America
(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
(170.6930) Medical optics and biotechnology : Tissue
(170.7050) Medical optics and biotechnology : Turbid media
Xingde Li, Christian Chudoba, Tony Ko, Costas Pitris, and James G. Fujimoto, "Imaging needle for optical coherence tomography," Opt. Lett. 25, 1520-1522 (2000)