Acquisition of fetal magnetocardiograms in an unshielded hospital setting

A. Brazdeikis, G. J. Vázquez-Flores, I. C. Tan, N. S. Padhye, M. T. Verklan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The acquisition of fetal magnetocardiographic signals in various noisy environments is studied, and improvement in the signal-to-noise ratio (SNR) of weak biomagnetic signals is investigated for various noise levels and gradiometer implementations. There is a consistent improvement in the SNR as fetal gestation age (GA) increases. The SNR in unshielded environment is shown to be acceptable over a wide range of GA values when using the second-order gradiometers with a field balance CB = 5 × 10-4 and a gradient balance CG1 = 5 × 10-3 or better. It is also shown that the optimal gradiometer baseline length strongly depends on the ambient noise level and the overall gradiometer balance. Shorter (<80 mm) baselines are preferred only when using highly balanced gradiometers in a very high noise environments.

Original languageEnglish (US)
Pages (from-to)823-826
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
StatePublished - Jun 2007
Externally publishedYes

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gradiometers
Signal to noise ratio
acquisition
signal to noise ratios
gradients

Keywords

  • Biomagnetic modeling
  • Biomagnetic signal detection
  • Fetal magnetocardiography
  • SQUID magnetometers
  • Unshielded environment

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Brazdeikis, A., Vázquez-Flores, G. J., Tan, I. C., Padhye, N. S., & Verklan, M. T. (2007). Acquisition of fetal magnetocardiograms in an unshielded hospital setting. IEEE Transactions on Applied Superconductivity, 17(2), 823-826. https://doi.org/10.1109/TASC.2007.897308

Acquisition of fetal magnetocardiograms in an unshielded hospital setting. / Brazdeikis, A.; Vázquez-Flores, G. J.; Tan, I. C.; Padhye, N. S.; Verklan, M. T.

In: IEEE Transactions on Applied Superconductivity, Vol. 17, No. 2, 06.2007, p. 823-826.

Research output: Contribution to journalArticle

Brazdeikis, A, Vázquez-Flores, GJ, Tan, IC, Padhye, NS & Verklan, MT 2007, 'Acquisition of fetal magnetocardiograms in an unshielded hospital setting', IEEE Transactions on Applied Superconductivity, vol. 17, no. 2, pp. 823-826. https://doi.org/10.1109/TASC.2007.897308
Brazdeikis, A. ; Vázquez-Flores, G. J. ; Tan, I. C. ; Padhye, N. S. ; Verklan, M. T. / Acquisition of fetal magnetocardiograms in an unshielded hospital setting. In: IEEE Transactions on Applied Superconductivity. 2007 ; Vol. 17, No. 2. pp. 823-826.
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