A polarization sensitive Jones matrix optical coherence tomography (JM-OCT) prototype was utilized to investigate in vivo wildtype zebrafish in different development stages. JM-OCT is a functional extension of conventional intensity-based OCT to visualize polarization properties of samples. We demonstrated simultaneous structural and functional imaging of in vivo wildtype zebrafish at the age of eight-days, one and two-months post-fertilization. The scattering and polarization characteristics of the anatomical features, such as the eye, and the muscles, were investigated and quantified non-invasively and in three-dimensions. Furthermore, the setup was able to visualize dynamic processes like the blood flow in a label-free way.
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