| Vector projection of biomagnetic fields. | |
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MedLine Citation:
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PMID: 15742724 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Biomagnetic measurements are increasingly popular as functional imaging techniques for the non-invasive assessment of electrically active tissue. Although most currently available magnetometers utilise only one component of the vector magnetic field, some studies have suggested the possibility of obtaining additional information from recordings of the full magnetic field vector. Three projection techniques were applied to different biomagnetic signals for analysis of the three orthogonal components of the vector magnetic field. Vector magnetic fields obtained from fetal cardiac activity were projected into evenly spaced directions around a unit sphere. The vector magnetic field recorded from multiple intestinal current sources with independent temporal frequencies was then projected. Finally, an external reference signal from an invasive electrode was used to project the recorded vector magnetic fields due to gastric electrical activity. In each case, it was found that the information obtained by examination of the projected magnetic field vectors gave superior clinical insight to that obtained by analysis of any single magnetic field component. |
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Authors:
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L A Bradshaw; A Myers; W O Richards; W Drake; J P Wikswo |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Medical & biological engineering & computing Volume: 43 ISSN: 0140-0118 ISO Abbreviation: Med Biol Eng Comput Publication Date: 2005 Jan |
Date Detail:
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Created Date: 2005-03-03 Completed Date: 2005-07-18 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 7704869 Medline TA: Med Biol Eng Comput Country: England |
Other Details:
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Languages: eng Pagination: 85-93 Citation Subset: IM |
Affiliation:
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Department of Physics & Astronomy, Vanderbilt University, Nashville, USA. leonard.abradshaw@vanderbilt.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Electrodiagnosis / methods* Electromagnetic Fields* Female Fetal Heart / physiology Gastrointestinal Tract / physiology Humans Pregnancy Prenatal Diagnosis / methods Rabbits Signal Processing, Computer-Assisted* |
| Grant Support | |
ID/Acronym/Agency:
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1 R01 DK-58697/DK/NIDDK NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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