Smartphone-based multimodal tethered capsule endoscopic platform for white-light, narrow-band, and fluorescence/autofluorescence imaging

Sharma G, Thoma OM, Blessing K, Gall R, Waldner M, Singh K (2021)

Publication Type: Conference contribution

Publication year: 2021

Journal

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers (SPIE)

Publisher: SPIE-INT SOC OPTICAL ENGINEERING

City/Town: BELLINGHAM

Conference Proceedings Title: TRANSLATIONAL BIOPHOTONICS: DIAGNOSTICS AND THERAPEUTICS

Event location: , ELECTR NETWORK

DOI: 10.1117/12.2614464

Abstract

Multimodal low-cost endoscopy is desirable in poor resource settings. Here, we developed smartphone-based low-cost, reusable tethered capsule endoscope that allows white-light, narrowband, and fluorescence/autofluorescence imaging of esophagus

Endoscopy is an integral part of the healthcare system for the diagnosis of diseases in the gastrointestinal tract. There are different types of endoscopes such as white-light [1], narrow-band [2], autofluorescence [3], confocal [4], Raman [5] imaging endoscopes, etc. which are used clinically as diagnostic or research tools. Out of these, white-light, narrow-band, and autofluorescence-based imaging techniques are the most commonly used for the diagnosis of complications related to the gastrointestinal tract. In this work, we demonstrate a smartphone-compatible, low-cost, reusable tethered capsule endoscopic platform capable of performing the three commonly used imaging modalities; white-light imaging (WLI), narrow-band imaging (NBI), and fluorescence/autofluorescence imaging (FI/AFI).


Figure 1 (a) shows the design of our low-cost endoscope. We used an off the shelf USB powered camera fitted with white light LED’s around it for detection and illumination respectively. The camera unit was housed in 10 mm outer diameter, 6 mm inner diameter, and 26 mm long capsule. The capsule was fabricated in-house from transparent Fluorinated ethylene propylene (FEP). The camera processor transferred the images to the USB port using 5 electrical wires of diameter 0.15 mm each. These wires were placed in a reinforced polytetrafluoroethylene sheath. The camera, the video processor, and the LED light source were all operated by a 5V power supply delivered from a USB connection. The power emitted from the LED source was approximately 2.8 mW and an image size of 640×480 pixels was provided by the camera. This whole unit served as a tethered capsule WLI endoscope.

Authors with CRIS profile

Oana-Maria Thoma Department of Medicine 1 – Gastroenterology, Pneumology and Endocrinology Maximilian Waldner Lehrstuhl für Innere Medizin I

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Sharma, G., Thoma, O.-M., Blessing, K., Gall, R., Waldner, M., & Singh, K. (2021). Smartphone-based multimodal tethered capsule endoscopic platform for white-light, narrow-band, and fluorescence/autofluorescence imaging. In TRANSLATIONAL BIOPHOTONICS: DIAGNOSTICS AND THERAPEUTICS. , ELECTR NETWORK: BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING.

MLA:

Sharma, Gargi, et al. "Smartphone-based multimodal tethered capsule endoscopic platform for white-light, narrow-band, and fluorescence/autofluorescence imaging." Proceedings of the European Conferences on Biomedical Optics - Translational Biophotonics - Diagnostics and Therapeutics, , ELECTR NETWORK BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING, 2021.

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