TY - JOUR
T1 - In vivo characterization of a wireless telemetry module for a capsule endoscopy system utilizing a conformal antenna
AU - Faerber, Julia
AU - Cummins, Gerard
AU - Pavuluri, Sumanth Kumar
AU - Record, Paul
AU - Rodriguez, Adrián Ayastuy
AU - Lay, Holly S.
AU - McPhillips, Rachael
AU - Cox, Benjamin F.
AU - Connor, Ciaran
AU - Gregson, Rachael
AU - Clutton, Richard Eddie
AU - Khan, Sadeque Reza
AU - Cochran, Sandy
AU - Desmulliez, Marc Phillipe Yves
PY - 2018/2
Y1 - 2018/2
N2 - 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normal operating conditions, used data packets at a steady power level of 0 dBm, while the capsule was being withdrawn at a steady rate from the small intestine.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.
AB - 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normal operating conditions, used data packets at a steady power level of 0 dBm, while the capsule was being withdrawn at a steady rate from the small intestine.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.
KW - capsule endoscopy
KW - conformal antenna
KW - helix antenna
KW - ingestible medical devices
KW - implantable devices
KW - in vivo data transmission
KW - wireless capsule endoscopy
KW - wireless data transmission
UR - https://researchportal.hw.ac.uk/en/publications/in-vivo-characterization-of-a-wireless-telemetry-module-for-a-cap
U2 - 10.1109/TBCAS.2017.2759254
DO - 10.1109/TBCAS.2017.2759254
M3 - Article
SN - 1932-4545
VL - 12
SP - 95
EP - 105
JO - IEEE Transactions on Biomedical Circuits and Systems
JF - IEEE Transactions on Biomedical Circuits and Systems
IS - 1
ER -