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Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source

机译:内窥镜前瞻性光学相干断层扫描和血管造影与MHz扫描源

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Endoscopic optical coherence tomography (OCT) instruments are mostly side viewing and rely on at least one proximal scan, thus limiting accuracy of volumetric imaging and en face visualization. Previous forward-viewing OCT devices had limited axial scan speeds. We report a forward-viewing fiber scanning 3D-OCT probe with 900 mu m field of view and 5 mu m transverse resolution, imaging at 1 MHz axial scan rate in the human gastrointestinal tract. The probe is 3.3 mm diameter and 20 mm rigid length, thus enabling passage through the endoscopic channel. The scanner has 1.8 kHz resonant frequency, and each volumetric acquisition takes 0.17 s with 2 volumes/s display. 3D-OCT and angiography imaging of the colon was performed during surveillance colonoscopy. (C) 2017 Optical Society of America
机译:内窥镜光学相干断层扫描(OCT)仪器主要是侧视图,依赖于至少一个近侧扫描,从而限制体积成像和en面可视化的精度。 以前的前进查看OCT设备有限的轴向扫描速度。 我们报告了一种前瞻性光纤扫描3D-OCT探针,具有900μm的视野和5μm横向分辨率,在人胃肠道的1 MHz轴向扫描速率下成像。 探针直径为3.3毫米,长度为20毫米,从而使通过内窥镜通道能够通过。 扫描仪具有1.8 kHz的谐振频率,每个体积采集需要0.17秒,具有2卷/秒。 在监测结肠镜检查期间进行结肠的3D-OCT和血管造影成像。 (c)2017年光学学会

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