Abstract

Imaging cellular and extracellular structures and processes in situ and in vivo is highly desired for the understanding and diagnosis of human diseases. High resolution optical coherence tomography (HR-OCT) is particularly suitable for this task because it can provide real-time, 3-D images of a large tissue volume at subcellular resolution. Over the past two decades, tremendous technical advances have been made to tackle the fundamental and practical limitations of HR-OCT for applications in various clinical fields. Meanwhile, novel scientific and clinical applications of HR-OCT have also been proposed and validated. This review aims to provide an update on the progress of technology development, with a focus on axial focus extension, aberration correction, and fiber-optic probe development. This review also aims to summarize the newly established capabilities of HR-OCT in fundamental and clinical research, in an effort to promote multidisciplinary research using this powerful imaging tool.

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