Magnetoenterography (MENG) : Noninvasive measurement of bioelectric activity in human small intestine

The basic electrical rhythm (BER) of the gastrointestinal tract creates minute magnetic fields that have been measured in animals using a Superconducting QUantum Interference Device (SQUID) gradiometer. The aim of this study was to measure noninvasively the biomagnetic fields of human stomach and sm...

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Bibliographic Details
Published in:Digestive diseases and sciences 1996-12, Vol.41 (12), p.2293-2301
Main Authors: RICHARDS, W. O, BRADSHAW, L. A, STATON, D. J, GARRARD, C. L, LIU, F, BUCHANAN, S, WIKSWO, J. P
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Digestive tract
Duodenum - physiology
Electrodiagnosis. Electric activity recording
Electromagnetic Fields
Electrophysiology
Female
Fourier Analysis
Humans
Ileum - physiology
Intestine, Small - physiopathology
Investigative techniques, diagnostic techniques (general aspects)
Jejunum - physiology
Linear Models
Magnetics
Male
Medical sciences
Middle Aged
Muscle, Smooth - physiology
Reference Values
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Summary:The basic electrical rhythm (BER) of the gastrointestinal tract creates minute magnetic fields that have been measured in animals using a Superconducting QUantum Interference Device (SQUID) gradiometer. The aim of this study was to measure noninvasively the biomagnetic fields of human stomach and small intestine. Twenty-one human volunteers were studied using a 37-channel SQUID gradiometer positioned over the epigastrium and umbilicus. In one volunteer additional biomagnetic recordings were performed in order to map the spatial variation of the biomagnetic fields. Cyclical waveforms consistent with gastric BER [3.0+/-0.5 cycles per minute (cpm)] and small intestine BER (10.26+/-1.74 cpm) were seen in the epigastrium and umbilicus, respectively. The mapping study identified the expected frequency gradient (12.0 cpm in duodenum, 11.3 cpm in jejunum, to 9.7 cpm in ileum) within the small intestine. Noninvasive recordings of human gastric and small intestinal BER can be obtained using a SQUID gradiometer.
ISSN:0163-2116
1573-2568
DOI:10.1007/BF02100117