Abstract
In optical coherence elastography, images are formed by mapping a mechanical property of tissue. Such images, known as elastograms, are formed on the microscale, intermediate between that of cells and whole organs. Optical coherence elastography holds great promise for detecting and monitoring the altered mechanical properties that accompany many clinical conditions and pathologies, particularly in cancer, cardiovascular disease and eye disease. In this review, we first consider how the mechanical properties of tissue are linked with tissue function and pathology. We then describe currently prominent optical coherence elastography techniques, with emphasis on the methods of mechanical loading and displacement estimation. We highlight the sensitivity to microstrain deformations at tens of micrometer resolution. Throughout, optical coherence elastography is considered in the context of other elastography methods, mainly ultrasound elastography and magnetic resonance elastography. This context serves to highlight its advantages, early stage of development of applications, and strong prospects for future impact.
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