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

doi:10.1109/TASC.2003.813859

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

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

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/Hz^1/2 above 10 Hz and 100 fT/Hz^1/2 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 language	English
Pages (from-to)	381-384
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2 I
DOIs	https://doi.org/10.1109/TASC.2003.813859
Publication status	Published - 2003 Jun
Event	2002 Applied Superconductivity Conference - Houston, TX, United States Duration: 2002 Aug 4 → 2002 Aug 9

Keywords

Biomagnetism
Magnetometer
SQUID

ASJC Scopus subject areas

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

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10.1109/TASC.2003.813859

Cite this

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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}",

note = "Funding Information: Manuscript received August 5, 2002. This work was supported in part by the Ministry of Education of the R.O.C. under Grant 91-N-FA01-2-4-2 and the National Science Council of the ROC. under Grants NSC90-2112-M-002-044 and NSC90-2112-M-003-021.; 2002 Applied Superconductivity Conference ; Conference date: 04-08-2002 Through 09-08-2002",

year = "2003",

month = jun,

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

N1 - Funding Information: Manuscript received August 5, 2002. This work was supported in part by the Ministry of Education of the R.O.C. under Grant 91-N-FA01-2-4-2 and the National Science Council of the ROC. under Grants NSC90-2112-M-002-044 and NSC90-2112-M-003-021.

PY - 2003/6

Y1 - 2003/6

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

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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

SN - 1051-8223

VL - 13

SP - 381

EP - 384

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2 I

T2 - 2002 Applied Superconductivity Conference

Y2 - 4 August 2002 through 9 August 2002

ER -

Biomagnetic measurements with HTS SQUID magnetometers in moderate shielded environments

Abstract

Keywords

ASJC Scopus subject areas

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