In vivo characterization of a wireless telemetry module for a capsule endoscopy system utilizing a conformal antenna

Faerber, J. et al. (2018) In vivo characterization of a wireless telemetry module for a capsule endoscopy system utilizing a conformal antenna. IEEE Transactions on Biomedical Circuits and Systems, 12(1), pp. 95-105. (doi: 10.1109/TBCAS.2017.2759254) (PMID:29377799)

Abstract

This paper describes the design, fabrication, packaging, and performance characterization of a conformal helix antenna created on the outside of a 10 mm ×30 mm capsule endoscope designed to operate at a carrier frequency of 433 MHz within human tissue. Wireless data transfer was established between the integrated capsule system and an external receiver. The telemetry system was tested within a tissue phantom and in vivo porcine models. Two different types of transmission modes were tested. The first mode, replicating normal operating conditions, used data packets at a steady power level of 0 dBm, while the capsule was being withdrawn at a steady rate from the small intestine. The second mode, replicating the worst-case clinical scenario of capsule retention within the small bowel, sent data with stepwise increasing power levels of –10, 0, 6, and 10 dBm, with the capsule fixed in position. The temperature of the tissue surrounding the external antenna was monitored at all times using thermistors embedded within the capsule shell to observe potential safety issues. The recorded data showed, for both modes of operation, a low error transmission of 10−3 packet error rate and 10−5 bit error rate and no temperature increase of the tissue according to IEEE standards.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Connor, Mr Ciaran and Cochran, Professor Sandy and Lay, Dr Holly and McPhillips, Miss Rachael
• Authors: Faerber, J., Cummins, G., Pavuluri, S. K., Record, P., Rodriguez, A. R. A., Lay, H. S., McPhillips, R., Cox, B. F., Connor, C., Gregson, R., Clutton, R. E., Khan, S. R., Cochran, S., and Desmulliez, M. P. Y.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: IEEE Transactions on Biomedical Circuits and Systems
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 1932-4545
• ISSN (Online): 1940-9990
• Published Online: 03 November 2017
• Copyright Holders: Copyright © 2017 The Authors
• First Published: First published in IEEE Transactions on Biomedical Circuits and Systems 12(1):95-105
• Publisher Policy: Reproduced under a Creative Commons License