Fig. 1. Schematic diagram of catheter based PS-OCT system

Fig. 2. Flow chart of double-state numerical dispersion compensation method

Fig. 3. Traversal results of reflection signal intensity from fiber catheter surface under different second-order and third-order dispersion coefficients. (a) Traversal result under second-order dispersion coefficient of SOP1; (b) traversal result under second-order dispersion coefficient of SOP2; (c) traversal result under third-order dispersion coefficients of SOP1; (d) traversal result under third-order dispersion coefficient of SOP2

Fig. 4. Comparison of z-domain spectra before and after two-state numerical dispersion compensation. (a) SOP1; (b) SOP2

Fig. 5. Comparison of tissue imaging results before and after dual-state numerical dispersion compensation. (a) Intensity of tissue before compensation; (b) intensity of tissue after compensation

Fig. 6. Comparison of tissue imaging before and after two-state numerical dispersion compensation. (a1)--(a4) Images of ex vivo chicken breast muscle; (b1)--(b4) images of ex vivo human nails; (c1)--(c4) images of ex vivo porcine cardiac muscle; (d1)--(d4) images of ex vivo porcine cardiac blood vessel