Endoscopic Optical Coherence Elastography Using Acoustic Radiation Force and Bending Vibration of Optical Fiber

Optical coherence tomography (OCT) is an optical imaging technique that provides high-resolution cross-sectional image for clinical and biological field, and the OCT systems have a depth resolution of less than 10 m. Recently, measurement of hardness using endoscopic OCT is required . Fig. 1 Basic configuration of the endoscopic OCT-based elastography using the focusing transducer and bending vibration of the optical fiber. We have proposed the high-speed optical scanner in simple structure using bending vibration of an optical fiber for scanning of the measurement light from OCT system to sample tissue. In this report, we investigate the miniaturization of the endoscope, and demonstrate endoscopic OCT elastography by combining it with acoustic radiation force . 1 mm Vibrating fiber