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Magneto-inductive magnetic resonance imaging duodenoscope

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Title: Magneto-inductive magnetic resonance imaging duodenoscope
Authors: Syms, RRA
Kardoulaki, E
Rea, M
Choonee, K
Taylor-Robinson, S
Wadsworth, C
Young, IR
Item Type: Journal Article
Abstract: A magnetic resonance imaging (MRI) duodenoscope is demonstrated, by combining non- magnetic endoscope components with a thin-film receiver based on a magneto-inductive waveguide. The waveguide elements consist of figure-of-eight shaped inductors formed on either side of a flexible substrate and parallel plate capacitors that use the substrate as a dielectric. Operation is simulated using equivalent circuit models and by computation of two- and three-dimensional sensitivity patterns. Circuits are fabricated for operation at 127.7 MHz by double-sided patterning of copper-clad Kapton and assembled onto non-magnetic flexible endoscope insertion tubes. Operation is verified by bench testing and by 1 H MRI at 3T using phantoms. The receiver can form a segmented coaxial image along the length of the endoscope, even when bent, and shows a signal-to-noise-ratio advantage over a surface array coil up to three times the tube diameter at the tip. Initial immersion imaging experiments have been carried out and confirm an encouraging lack of sensitivity to RF heating.
Issue Date: 14-Sep-2017
Date of Acceptance: 1-Aug-2017
URI: http://hdl.handle.net/10044/1/64159
DOI: https://dx.doi.org/10.2528/PIER17062104
ISSN: 1070-4698
Publisher: EMW Publishing
Start Page: 125
End Page: 138
Journal / Book Title: Progress in Electromagnetics Research (PIER)
Volume: 159
Copyright Statement: © Copyright 2017 EMW Publishing. All Rights Reserved
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Medical Research Council (MRC)
The Royal Society
Engineering & Physical Science Research Council (EPSRC)
The Royal Society
AMMF
Imperial College Healthcare Charity
Engineering & Physical Science Research Council (E
AMMF
Funder's Grant Number: GR/S08077/01
G9900178
N/A
EP/D032687/1
2005/R1
N/A
5101
EP/P510798/1
2017/112
Keywords: Science & Technology
Technology
Physical Sciences
Engineering, Electrical & Electronic
Physics, Applied
Telecommunications
Engineering
Physics
RECEIVER COIL
MRI
CATHETERS
GUIDE
WIRES
1005 Communications Technologies
0906 Electrical And Electronic Engineering
Networking & Telecommunications
Publication Status: Published
Appears in Collections:Department of Surgery and Cancer
Electrical and Electronic Engineering