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

Antonio López-Marín, Geert Springeling, Robert Beurskens, Heleen van Beusekom, Antonius F.W. van der Steen, Arjun D. Koch, Brett E. Bouma, Robert Huber, Gijs V.A.N. Soest, Tianshi Wang*

*Corresponding author for this work
3 Citations (Scopus)


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.

Original languageEnglish
JournalOptics Letters
Issue number15
Pages (from-to)3641-3644
Number of pages4
Publication statusPublished - 01.08.2019

Research Areas and Centers

  • Academic Focus: Biomedical Engineering


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