Ultra-fast line-field swept source scanning optical coherence elastography

The drawbacks of repeated excitations and long imaging time in wave-based optical coherence elastography limited its application in ophthalmology. In this study, we put forward a swept source scanning optical coherence elastography (SSS-OCE) system based on the wavelength-dependence scanning technique. A dispersive element was employed to achieve ultra-fast line scanning from swept light source. Through a series of experiments on agar phantoms with varying concentrations, in situ porcine corneas under different intraocular pressures, and human eyes in vivo, we have demonstrated that SSS-OCE has the capability to rapidly evaluate the elasticity of ocular tissues in vivo with single excitation and offers the advantages of a simple structure and short measurement time.