Fig. 1. Schematic of SDOCT system

Fig. 2. Experimental setup

Fig. 3. OCT images of rat kidney. (a) Cross-section image (x×z=3 mm×2.56 mm, dx×dz=6 μm×2.5 μm), and the letter “T” represents kidney tubules; (b) schematic of 3D image reconstruction; (c) 3D image of kidney (x×y×z=1.5 mm×1.0 mm×0.2 mm,dx×dy×dz=5 μm×5 μm×2.5 μm); (d) en face image (x×z=3 mm×3 mm, dx×dy=6 μm×6 μm)

Fig. 4. Registration of a series of cross-section image (y-z plane). (a) Image directly reconstructed by OCT cross-section images; (b) image after registration

Fig. 5. Comparison diagram of OCT image and HE staining image. (a) Cross-section image; (b) HE staining section (Olympus, 40×); (c) distribution curve of light intensity with depth (HE staining section, 400×)

Fig. 6. OCT cross-section images and en face images. (a) 10 min after blood reperfusion; (b) 15 min after blood reperfusion; (c) 20 min after blood reperfusion; (d) 30 min after blood reperfusion