Integrated three-dimensional scanner for endoscopic optical coherence tomography

Abstract

International audienceNumerous optical imaging techniques have been developed for clinical diagnostics; among these, optical coherence tomography (OCT) has proven to be of considerable utility due to its ability to non-destructively image below the surface of tissue. Endoscopic OCT systems will further extend the capabilities of this approach but require an additional means for scanning in two or three dimensions. We present an integrated optical microsystem which allows scanning of an optical beam in three dimensions (an area scan combined with dynamic focus) suitable for an endoscopic OCT probe. The system is defined by a tunable pneumatically-actuated micro-lens combined with an electrostatically-actuated two-axis micro-mirror, allowing functionality hitherto not achievable

Piston Motion Performance Analysis of a 3DOF Electrothermal MEMS Scanner for Medical Applications

“…[1] There are some applications based on optical microsystems which are under investigation as microspectrometers, [2,3] confocal microscope for sample analysis, [4] optical coherence tomography (OCT) for in-vivo cancer detection, [5][6][7][8] and laser microsurgery. [9] It is observed that most optical microsystems are based on MEMS scanners.…”

Tiny endoscopic optical coherence tomography probe driven by a miniaturized hollow ultrasonic motor

“…Due to limitation of the light penetration, small and highresolution probes for endoscopic OCT have been regarded as powerful tools in examining internal organs. 2 There have been various designs of endoscopic OCT probes over the past decade, [3][4][5][6] which can be divided into two groups based on the scanning modes: forward scanning and circumferential scanning. Among them, circumferential probes are utilized extensively for imaging within hollow tissues, such as arteries, esophagus, and colon.…”