Motorized capsule for shadow-free OCT imaging and synchronous beam control

Optics Letters
Antonio López-MarínTianshi Wang

Abstract

We demonstrate a tethered motorized capsule for unobstructed optical coherence tomography (OCT) imaging of the esophagus. By using a distal reflector design, we avoided the common shadow artifact induced by the motor wires. A synchronous driving technique features three types of beam-scanning modes of the capsule, i.e., circumferential beam scanning, localized beam scanning, and accurate beam positioning. We characterized these three modes and carried out ex vivo imaging experiments using the capsule. The results show that the capsule can potentially be a useful tool for diagnostic OCT imaging and OCT-guided biopsy and therapy of the esophagus.

References

Nov 22, 1991·Science·D HuangC A Puliafito
Mar 1, 1995·Archives of Ophthalmology·M R HeeJ G Fujimoto
Jun 27, 1997·Science·G J TearneyJ G Fujimoto
Aug 14, 2013·Optics Letters·Tianshi WangGijs van Soest
Jan 28, 2014·Gastrointestinal Endoscopy·Melissa J SuterGuillermo J Tearney
Apr 25, 2015·Biomedical Optics Express·Kaicheng LiangJames G Fujimoto
Sep 29, 2017·Optics Letters·Tianshi WangGijs van Soest
Mar 21, 2019·Biomedical Optics Express·Chia-Pin LiangGuillermo Tearney

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