High-Tc SQUID gradiometer system for magnetocardiography in an unshielded environment

S. H. Liao; S. C. Hsu; C. C. Lin; H. E. Horng; J. C. Chen; M. J. Chen; C. H. Wu; H. C. Yang

doi:10.1088/0953-2048/16/12/023

High-T_c SQUID gradiometer system for magnetocardiography in an unshielded environment

S. H. Liao^*, S. C. Hsu, C. C. Lin, H. E. Horng, J. C. Chen, M. J. Chen, C. H. Wu, H. C. Yang

^*Corresponding author for this work

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

25 Citations (Scopus)

Abstract

We set up an electronic gradiometer for magnetocardiography (MCG) in an unshielded environment. The electronically balanced gradiometer consists of high-temperature radio-frequency superconducting quantum interference device (rf SQUID) magnetometers. The rf SQUID magnetometers are arranged to form the electronic first-order, four-vector gradiometer, or second-order gradiometer. The output of the MCG signal was filtered by a band pass (1-30 Hz) and power line filters. We can reduce the noise to ∼1 pT Hz^-1/2 at 1 Hz for second-order or four-vector gradiometers. Two-dimensional MCG imaging is demonstrated. The results are discussed with data measured in the moderate magnetically shielded environment.

Original language	English
Pages (from-to)	1426-1429
Number of pages	4
Journal	Superconductor Science and Technology
Volume	16
Issue number	12
DOIs	https://doi.org/10.1088/0953-2048/16/12/023
Publication status	Published - 2003 Dec
Event	ISEC 2003, International Superconducting Electronics Conference - Sydney,NSW, Australia Duration: 2003 Jul 7 → 2003 Jul 11

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0953-2048/16/12/023

Cite this

@article{316ef3db50864c6196351666de82d952,

title = "High-Tc SQUID gradiometer system for magnetocardiography in an unshielded environment",

abstract = "We set up an electronic gradiometer for magnetocardiography (MCG) in an unshielded environment. The electronically balanced gradiometer consists of high-temperature radio-frequency superconducting quantum interference device (rf SQUID) magnetometers. The rf SQUID magnetometers are arranged to form the electronic first-order, four-vector gradiometer, or second-order gradiometer. The output of the MCG signal was filtered by a band pass (1-30 Hz) and power line filters. We can reduce the noise to ∼1 pT Hz-1/2 at 1 Hz for second-order or four-vector gradiometers. Two-dimensional MCG imaging is demonstrated. The results are discussed with data measured in the moderate magnetically shielded environment.",

author = "Liao, {S. H.} and Hsu, {S. C.} and Lin, {C. C.} and Horng, {H. E.} and Chen, {J. C.} and Chen, {M. J.} and Wu, {C. H.} and Yang, {H. C.}",

year = "2003",

month = dec,

doi = "10.1088/0953-2048/16/12/023",

language = "English",

volume = "16",

pages = "1426--1429",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "IOP Publishing Ltd.",

number = "12",

note = "ISEC 2003, International Superconducting Electronics Conference ; Conference date: 07-07-2003 Through 11-07-2003",

}

TY - JOUR

T1 - High-Tc SQUID gradiometer system for magnetocardiography in an unshielded environment

AU - Liao, S. H.

AU - Hsu, S. C.

AU - Lin, C. C.

AU - Horng, H. E.

AU - Chen, J. C.

AU - Chen, M. J.

AU - Wu, C. H.

AU - Yang, H. C.

PY - 2003/12

Y1 - 2003/12

N2 - We set up an electronic gradiometer for magnetocardiography (MCG) in an unshielded environment. The electronically balanced gradiometer consists of high-temperature radio-frequency superconducting quantum interference device (rf SQUID) magnetometers. The rf SQUID magnetometers are arranged to form the electronic first-order, four-vector gradiometer, or second-order gradiometer. The output of the MCG signal was filtered by a band pass (1-30 Hz) and power line filters. We can reduce the noise to ∼1 pT Hz-1/2 at 1 Hz for second-order or four-vector gradiometers. Two-dimensional MCG imaging is demonstrated. The results are discussed with data measured in the moderate magnetically shielded environment.

AB - We set up an electronic gradiometer for magnetocardiography (MCG) in an unshielded environment. The electronically balanced gradiometer consists of high-temperature radio-frequency superconducting quantum interference device (rf SQUID) magnetometers. The rf SQUID magnetometers are arranged to form the electronic first-order, four-vector gradiometer, or second-order gradiometer. The output of the MCG signal was filtered by a band pass (1-30 Hz) and power line filters. We can reduce the noise to ∼1 pT Hz-1/2 at 1 Hz for second-order or four-vector gradiometers. Two-dimensional MCG imaging is demonstrated. The results are discussed with data measured in the moderate magnetically shielded environment.

UR - http://www.scopus.com/inward/record.url?scp=0346343022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346343022&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/16/12/023

DO - 10.1088/0953-2048/16/12/023

M3 - Conference article

AN - SCOPUS:0346343022

SN - 0953-2048

VL - 16

SP - 1426

EP - 1429

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 12

T2 - ISEC 2003, International Superconducting Electronics Conference

Y2 - 7 July 2003 through 11 July 2003

ER -

High-T_c SQUID gradiometer system for magnetocardiography in an unshielded environment

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this