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Multichannel heart scanner based on high-T/sub c/ SQUIDs.

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Title: Multichannel heart scanner based on high-T/sub c/ SQUIDs.
Authors: ter Brake, H.J.M.1, Janssen, N., Flokstra, J., Veldhuis, D., Rogalla, H.
Source: IEEE Transactions on Applied Superconductivity. 1997, Vol. 7 Issue 2, p2545-2548. 4p.
Subjects: Superconducting quantum interference devices, Cardiac imaging, Magnetometers, Magnetocardiography, SQUID magnetometers
Abstract: A 7-channel magnetometer for magnetocardiography based on high-T/sub c/ SQUIDs has been realized. This magnetometer is used for test experiments in the development of a multichannel high-T/sub c/ SQUID based heart-scanner for clinical applications. The intrinsic noise level of the channels in the 7-channel system is typically 120 fT//spl radic/(Hz) down to 1 Hz. Magnetocardiograms were recorded inside a magnetically shielded room. Introductory experiments were performed on the suppression of noise by combining magnetometers to form planar gradiometers. The noise suppression that can be established appeared to be limited by the imbalance of the gradiometric configuration, which is roughly 2%. This relatively poor balance of the system is caused by inaccuracies in the transfer functions of the individual SQUID magnetometers, and by deviations from the planar geometry. [ABSTRACT FROM PUBLISHER]
Copyright of IEEE Transactions on Applied Superconductivity is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="DE" term="%22Superconducting+quantum+interference+devices%22">Superconducting quantum interference devices</searchLink><br /><searchLink fieldCode="DE" term="%22Cardiac+imaging%22">Cardiac imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetometers%22">Magnetometers</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetocardiography%22">Magnetocardiography</searchLink><br /><searchLink fieldCode="DE" term="%22SQUID+magnetometers%22">SQUID magnetometers</searchLink>
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  Data: A 7-channel magnetometer for magnetocardiography based on high-T/sub c/ SQUIDs has been realized. This magnetometer is used for test experiments in the development of a multichannel high-T/sub c/ SQUID based heart-scanner for clinical applications. The intrinsic noise level of the channels in the 7-channel system is typically 120 fT//spl radic/(Hz) down to 1 Hz. Magnetocardiograms were recorded inside a magnetically shielded room. Introductory experiments were performed on the suppression of noise by combining magnetometers to form planar gradiometers. The noise suppression that can be established appeared to be limited by the imbalance of the gradiometric configuration, which is roughly 2%. This relatively poor balance of the system is caused by inaccuracies in the transfer functions of the individual SQUID magnetometers, and by deviations from the planar geometry. [ABSTRACT FROM PUBLISHER]
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  Data: <i>Copyright of IEEE Transactions on Applied Superconductivity is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/77.621758
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        Text: English
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      – SubjectFull: Superconducting quantum interference devices
        Type: general
      – SubjectFull: Cardiac imaging
        Type: general
      – SubjectFull: Magnetometers
        Type: general
      – SubjectFull: Magnetocardiography
        Type: general
      – SubjectFull: SQUID magnetometers
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              Text: 1997
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