Lensed Fiber-Optic Two-Photon Endomicroscopy for Field-of-View Enhancement

Two-photon endomicroscopy is a promising technique with the ability to achieve in situ imaging and diagnosis at subcellular resolution. The large field-of-view capability is essential and useful to locate and image suspicious areas of biological tissue. In this work, we report objective-lens-free, lensed fiber-optic two-photon endomicroscopy for field-of-view enhancement. The field of view of this two-photon endomicroscopic probe is 750 mu m with a resolution of 3.03 mu m. This 1.6 g miniature probe has an integrated outer diameter of 5.8 mm and a rigid length of 33.5 mm. The imaging performance of the lensed-fiber-optic two-photon endomicroscopy was validated by examining an ex vivo mouse heart, kidney, brain, stomach wall tissues, and in vivo brain tissue.

Automated summary

This study presents a lensed fiber-optic two-photon endomicroscopy technique that does not require an objective lens, providing a larger field of view for in situ imaging and diagnosis at subcellular resolution. The probe has a field of view of 750 μm with a resolution of 3.03 μm, and has a small size and lightweight design, making it suitable for imaging both ex vivo and in vivo tissues.