Biomagnetic measurements with HTS SQUID magnetometers in moderate shielded environments

Herng Er Horng, Shou Yen Hung, Jen Tzong Jeng, Shu Hsien Liao, S. C. Hsu, Ji Chuu Hwang, Hong Chang Yang

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

An HTS SQUID magnetometer for biomagnetic measurements was implemented in a moderate noise shielded environment. The intrinsic noises of the SQUID magnetometer shielded with a tri-layer magnetic shielding cylinder were 50 fT/Hz1/2 above 10 Hz and 100 fT/Hz1/2 at 0.1 Hz. The moderate shielded environments are constructed of mu-metal layers. With the moderate shielding the magnitude of the QRS complex of a rat specimen was found to be around 10 pT and the signal-to-noise ratio was larger than 10. The requirements for improving biomagnetic measurements in the moderate magnetic shielding are discussed.

Original languageEnglish
Pages (from-to)381-384
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 I
DOIs
Publication statusPublished - 2003 Jun 1
Event2002 Applied Superconductivity Conference - Houston, TX, United States
Duration: 2002 Aug 42002 Aug 9

Fingerprint

Magnetic shielding
magnetic shielding
SQUIDs
Magnetometers
magnetometers
Shielding
rats
shielding
Rats
Signal to noise ratio
signal to noise ratios
Metals
requirements
metals

Keywords

  • Biomagnetism
  • Magnetometer
  • SQUID

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Biomagnetic measurements with HTS SQUID magnetometers in moderate shielded environments. / Horng, Herng Er; Hung, Shou Yen; Jeng, Jen Tzong; Liao, Shu Hsien; Hsu, S. C.; Hwang, Ji Chuu; Yang, Hong Chang.

In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 I, 01.06.2003, p. 381-384.

Research output: Contribution to journalConference article

@article{e7340dca6e724ec0a60bb1df714da83d,
title = "Biomagnetic measurements with HTS SQUID magnetometers in moderate shielded environments",
abstract = "An HTS SQUID magnetometer for biomagnetic measurements was implemented in a moderate noise shielded environment. The intrinsic noises of the SQUID magnetometer shielded with a tri-layer magnetic shielding cylinder were 50 fT/Hz1/2 above 10 Hz and 100 fT/Hz1/2 at 0.1 Hz. The moderate shielded environments are constructed of mu-metal layers. With the moderate shielding the magnitude of the QRS complex of a rat specimen was found to be around 10 pT and the signal-to-noise ratio was larger than 10. The requirements for improving biomagnetic measurements in the moderate magnetic shielding are discussed.",
keywords = "Biomagnetism, Magnetometer, SQUID",
author = "Horng, {Herng Er} and Hung, {Shou Yen} and Jeng, {Jen Tzong} and Liao, {Shu Hsien} and Hsu, {S. C.} and Hwang, {Ji Chuu} and Yang, {Hong Chang}",
year = "2003",
month = "6",
day = "1",
doi = "10.1109/TASC.2003.813859",
language = "English",
volume = "13",
pages = "381--384",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2 I",

}

TY - JOUR

T1 - Biomagnetic measurements with HTS SQUID magnetometers in moderate shielded environments

AU - Horng, Herng Er

AU - Hung, Shou Yen

AU - Jeng, Jen Tzong

AU - Liao, Shu Hsien

AU - Hsu, S. C.

AU - Hwang, Ji Chuu

AU - Yang, Hong Chang

PY - 2003/6/1

Y1 - 2003/6/1

N2 - An HTS SQUID magnetometer for biomagnetic measurements was implemented in a moderate noise shielded environment. The intrinsic noises of the SQUID magnetometer shielded with a tri-layer magnetic shielding cylinder were 50 fT/Hz1/2 above 10 Hz and 100 fT/Hz1/2 at 0.1 Hz. The moderate shielded environments are constructed of mu-metal layers. With the moderate shielding the magnitude of the QRS complex of a rat specimen was found to be around 10 pT and the signal-to-noise ratio was larger than 10. The requirements for improving biomagnetic measurements in the moderate magnetic shielding are discussed.

AB - An HTS SQUID magnetometer for biomagnetic measurements was implemented in a moderate noise shielded environment. The intrinsic noises of the SQUID magnetometer shielded with a tri-layer magnetic shielding cylinder were 50 fT/Hz1/2 above 10 Hz and 100 fT/Hz1/2 at 0.1 Hz. The moderate shielded environments are constructed of mu-metal layers. With the moderate shielding the magnitude of the QRS complex of a rat specimen was found to be around 10 pT and the signal-to-noise ratio was larger than 10. The requirements for improving biomagnetic measurements in the moderate magnetic shielding are discussed.

KW - Biomagnetism

KW - Magnetometer

KW - SQUID

UR - http://www.scopus.com/inward/record.url?scp=0042943127&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042943127&partnerID=8YFLogxK

U2 - 10.1109/TASC.2003.813859

DO - 10.1109/TASC.2003.813859

M3 - Conference article

AN - SCOPUS:0042943127

VL - 13

SP - 381

EP - 384

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 2 I

ER -