NDLI: Towards minimally invasive monitoring for gastroenterology -An external Squamocolumnar Junction Locator

Content Provider	IEEE Xplore Digital Library
Author	Whiting, J.G.H. Djennati, N. Yeong Yeh Lee Robertson, E.V. Derakhshan, M.H. Connolly, P. McColl, K.E.L.
Copyright Year	2012
Description	Author affiliation: Inst. of Cardiovascular & Med. Sci., Univ. of Glasgow, Glasgow, UK (Yeong Yeh Lee; Robertson, E.V.; Derakhshan, M.H.; McColl, K.E.L.) \|\| Dept. of Bioeng., Strathclyde Univ., Glasgow, UK (Whiting, J.G.H.; Djennati, N.; Connolly, P.)
Abstract	Transient lower oesophageal sphincter relaxations (TLOSRs) occur frequently and are the main mechanism of acid reflux. The only means of currently detecting TLOSRs is intra-luminal manometry and the probes themselves may stimulate TLOSRs. The squamo-columnar junction moves 4-5 centimeters proximally during TLOSRs and this provides a means of detecting such episodes. The objective of this work is to develop a sensor system capable of detecting the movement of a miniature magnet attached to the squamo-columnar junction from outside the body and thus allow detection of TLOSRs without the artifact associated with intraluminal detection probes. A GaAs Hall effect sensor was selected and an alternating current supply was developed with a combination of filters and a Phase Sensitive Detector, to detect the magnet. The oscillation frequency of the current was chosen in order to reduce electronic noise, and filtering outside this frequency means the signal to noise ratio was greatly improved. The phase sensitive detector was employed to accurately convert the amplitude of the sensor's output to a DC signal. With the addition of paired Flux Concentrators increases the range up to 10.2 centimetres, an improvement of 580% over commercial Hall effect sensors. The AC circuit and flux concentrator device far exceeds the sensitivity of the current Hall effect sensors supplied in the market, by rejecting noise and providing accurate measurement over significantly larger distances. The development of this sensor has applications beyond this specific medical device.
Sponsorship	IEEE Eng. Medicine Biol. Soc.
Starting Page	1574
Ending Page	1577
File Size	737459
Page Count	4
File Format	PDF
ISBN	9781424441198
ISSN	1557170X
e-ISBN	9781457717871
DOI	10.1109/EMBC.2012.6346244
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic flux Magnetic noise Magnetic shielding Hall effect Magnetic resonance imaging Magnetic fields Magnetic field measurement
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Towards a Hall effect magnetic tracking device for MRI

A magnetic force sensor on a catheter tip for minimally invasive surgery

Magnetic human body communication

Spinal cord evoked magnetic field measurement using a magnetospinography system equipped with a cryocooler

A novel non-model-based 6-DOF electromagnetic tracking method using non-iterative algorithm

Dissolution of magnetically marked tablets: Investigations in a physical phantom

Magnetic flux density measurement with balanced steady state free precession pulse sequence for MREIT: A simulation study

Effect of peripheral nerve action currents on magnetic resonance imaging

Biomagnetic measurement system for supine subjects with expanded sensor array and real-time noise reduction

Towards minimally invasive monitoring for gastroenterology -An external Squamocolumnar Junction Locator

Similar Documents

Towards a Hall effect magnetic tracking device for MRI

A magnetic force sensor on a catheter tip for minimally invasive surgery

Magnetic human body communication

Spinal cord evoked magnetic field measurement using a magnetospinography system equipped with a cryocooler

A novel non-model-based 6-DOF electromagnetic tracking method using non-iterative algorithm

Dissolution of magnetically marked tablets: Investigations in a physical phantom

Magnetic flux density measurement with balanced steady state free precession pulse sequence for MREIT: A simulation study

Effect of peripheral nerve action currents on magnetic resonance imaging

Biomagnetic measurement system for supine subjects with expanded sensor array and real-time noise reduction

Towards minimally invasive monitoring for gastroenterology -An external Squamocolumnar Junction Locator