Shadow-free motorized capsule enables accurate beam positioning and sectorized OCT imaging of the esophagus

Conference paper (2020)

Authors

Geert Springeling Erasmus MC
Robert Beurskens Erasmus MC
A.F.W. van der Steen ImPhys/Medical Imaging - AS , Chinese Academy of Sciences, Erasmus MC
Arjun D. Koch Erasmus MC
Brett E. Bouma Massachusetts General Hospital/Harvard Medical School
Robert Huber University of Lübeck
Gijs Van Soest Erasmus MC
Tianshi Wang Erasmus MC
Research Group
ImPhys/Medical Imaging (AS) (TU Delft)
Copyright: © 2020 Antonio López-Marín, Geert Springeling, Robert Beurskens, Heleen Van Beusekom, A.F.W. van der Steen, Arjun D. Koch, Brett E. Bouma, Robert A. Huber, Gijs Van Soest, Tianshi Wang
DOI: https://doi.org/10.1117/12.2545689
Magnetic fields Image reconstruction Optical Coherence Tomography Optical imaging Gradient index lenses Light beams
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Published Date

2020

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Medical Imaging

Abstract

In this study, we demonstrate a 12x36 mm motorized capsule for OCT imaging of the esophagus. The capsule produces unobstructed images by using a distal reflector design, thus avoiding shadow caused by the motor wires. The motor synchronous control enables three working modes: circumferential imaging, angular sector imaging and accurate beam positioning. Distortion artifacts shown in the sector imaging were found to be induced by velocity changes of the motor. We specifically characterized the motor speed and found a symmetric and repeatable behavior during sector scanning. Resampling of the sector images A-lines was carried out to achieve uniform angular spacing according to the measured speed profile. Also, distortion between consecutive sector frames was corrected using image registration to achieve stable imaging.

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