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Detection of Small Bowel Slow-Wave Frequencies From Noninvasive Biomagnetic Measurements

We report a novel method for identifying the small intestine electrical activity slow-wave frequencies (SWFs) from noninvasive biomagnetic measurements. Superconducting quantum interference device magnetometer measurements are preprocessed to remove baseline drift and high-frequency noise. Subsequen...

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Published in:	IEEE transactions on biomedical engineering 2009-09, Vol.56 (9), p.2181-2189
Main Authors:	Erickson, Jonathan C., Obioha, Chibuike, Goodale, Adam, Bradshaw, L. Alan, Richards, William O.
Format:	Article
Language:	English
Subjects:	Algorithms Animals Biomagnetics Electric variables measurement Electromagnetic Fields Electrophysiological Phenomena Frequency measurement Gastrointestinal Motility - physiology Interference Intestine, Small - physiology Intestines Noise measurement Signal processing Signal Processing, Computer-Assisted slow wave SOBI SQUID SQUID magnetometers Superconducting device noise Superconducting devices Swine wavelet transforms
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container_title	IEEE transactions on biomedical engineering
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creator	Erickson, Jonathan C. Obioha, Chibuike Goodale, Adam Bradshaw, L. Alan Richards, William O.
description	We report a novel method for identifying the small intestine electrical activity slow-wave frequencies (SWFs) from noninvasive biomagnetic measurements. Superconducting quantum interference device magnetometer measurements are preprocessed to remove baseline drift and high-frequency noise. Subsequently, the underlying source signals are separated using the well-known second-order blind identification (SOBI) algorithm. A simple classification scheme identifies and assigns some of the SOBI components to a section of small bowel. SWFs were clearly identified in 10 out of 12 test subjects to within 0.09-0.25 cycles per minute. The method is sensitive at the 40.3 %-55.9% level, while false positive rates were 0%-8.6 %. This technique could potentially be used to help diagnose gastrointestinal ailments and obviate some exploratory surgeries.
doi_str_mv	10.1109/TBME.2009.2024087
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subjects	Algorithms Animals Biomagnetics Electric variables measurement Electromagnetic Fields Electrophysiological Phenomena Frequency measurement Gastrointestinal Motility - physiology Interference Intestine, Small - physiology Intestines Noise measurement Signal processing Signal Processing, Computer-Assisted slow wave SOBI SQUID SQUID magnetometers Superconducting device noise Superconducting devices Swine wavelet transforms
title	Detection of Small Bowel Slow-Wave Frequencies From Noninvasive Biomagnetic Measurements
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