DOI: 10.1118/1.594711. Noninvasive magnetic detection of cardiac mechanical activity: Experiments

Noninvasive magnetic detection of cardiac mechanical activity: Experiments

10.1118/1.594711

Crossref journal-article

Wiley

Medical Physics (311)

Abstract

The magnetic susceptibility of the heart and the intracardiac blood is substantially greater than that of the surrounding lung tissue. The periodic redistribution of blood and tissue during the cardiac cycle will thus alter an externally applied magnetic field. These magnetic field changes can be detected by a magnetometer outside the body, and have been termed magnetic susceptibility plethysmography (MSPG) signals. A differential magnetometer, a liquid helium dewar, and a superconducting persistent‐current magnet have been developed to detect the x component of the MSPG signal. The theoretical analysis of this instrument is presented to understand the spatial sensitivity of an MSPG susceptometer with a nonuniform magnetizing field. Preliminary measurements are shown to be in fair agreement with the model calculations. Several possible improvements of the technique are discussed.

Bibliography

Wikswo, J. P., Opfer, J. E., & Fairbank, W. M. (1980). Noninvasive magnetic detection of cardiac mechanical activity: Experiments. Medical Physics, 7(4), 307â314. Portico.

Authors 3

John P. Wikswo (first)
James E. Opfer (additional)
William M. Fairbank (additional)

References 0 Referenced 27

None

Dates

Type	When
Created	22 years, 1 month ago (Aug. 1, 2003, 2:39 p.m.)
Deposited	1 year, 11 months ago (Oct. 3, 2023, 9:15 a.m.)
Indexed	1 year ago (Aug. 9, 2024, 9:13 a.m.)
Issued	45 years, 2 months ago (July 1, 1980)
Published	45 years, 2 months ago (July 1, 1980)
Published Online	27 years, 3 months ago (June 4, 1998)
Published Print	45 years, 2 months ago (July 1, 1980)

Funders 0

None

BibTeX

@article{Wikswo_1980, title={Noninvasive magnetic detection of cardiac mechanical activity: Experiments}, volume={7}, ISSN={2473-4209}, url={http://dx.doi.org/10.1118/1.594711}, DOI={10.1118/1.594711}, number={4}, journal={Medical Physics}, publisher={Wiley}, author={Wikswo, John P. and Opfer, James E. and Fairbank, William M.}, year={1980}, month=jul, pages={307–314} }

JSON

{
  "indexed": {
    "date-parts": [
      [
        2024,
        8,
        9
      ]
    ],
    "date-time": "2024-08-09T13:13:11Z",
    "timestamp": 1723209191746
  },
  "reference-count": 0,
  "publisher": "Wiley",
  "issue": "4",
  "license": [
    {
      "start": {
        "date-parts": [
          [
            1998,
            6,
            4
          ]
        ],
        "date-time": "1998-06-04T00:00:00Z",
        "timestamp": 896918400000
      },
      "content-version": "vor",
      "delay-in-days": 6547,
      "URL": "http://onlinelibrary.wiley.com/termsAndConditions#vor"
    }
  ],
  "content-domain": {
    "domain": [],
    "crossmark-restriction": false
  },
  "published-print": {
    "date-parts": [
      [
        1980,
        7
      ]
    ]
  },
  "abstract": "<jats:p>The magnetic susceptibility of the heart and the intracardiac blood is substantially greater than that of the surrounding lung tissue. The periodic redistribution of blood and tissue during the cardiac cycle will thus alter an externally applied magnetic field. These magnetic field changes can be detected by a magnetometer outside the body, and have been termed magnetic susceptibility plethysmography (MSPG) signals. A differential magnetometer, a liquid helium dewar, and a superconducting persistent\u2010current magnet have been developed to detect the <jats:italic>x</jats:italic> component of the MSPG signal. The theoretical analysis of this instrument is presented to understand the spatial sensitivity of an MSPG susceptometer with a nonuniform magnetizing field. Preliminary measurements are shown to be in fair agreement with the model calculations. Several possible improvements of the technique are discussed.</jats:p>",
  "DOI": "10.1118/1.594711",
  "type": "journal-article",
  "created": {
    "date-parts": [
      [
        2003,
        8,
        1
      ]
    ],
    "date-time": "2003-08-01T18:39:03Z",
    "timestamp": 1059763143000
  },
  "page": "307-314",
  "source": "Crossref",
  "is-referenced-by-count": 27,
  "title": "Noninvasive magnetic detection of cardiac mechanical activity: Experiments",
  "prefix": "10.1002",
  "volume": "7",
  "author": [
    {
      "suffix": "Jr.",
      "given": "John P.",
      "family": "Wikswo",
      "sequence": "first",
      "affiliation": []
    },
    {
      "given": "James E.",
      "family": "Opfer",
      "sequence": "additional",
      "affiliation": []
    },
    {
      "given": "William M.",
      "family": "Fairbank",
      "sequence": "additional",
      "affiliation": []
    }
  ],
  "member": "311",
  "published-online": {
    "date-parts": [
      [
        1998,
        6,
        4
      ]
    ]
  },
  "container-title": "Medical Physics",
  "original-title": [],
  "language": "en",
  "link": [
    {
      "URL": "https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1118%2F1.594711",
      "content-type": "application/pdf",
      "content-version": "vor",
      "intended-application": "text-mining"
    },
    {
      "URL": "https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1118%2F1.594711",
      "content-type": "unspecified",
      "content-version": "vor",
      "intended-application": "text-mining"
    },
    {
      "URL": "https://aapm.onlinelibrary.wiley.com/doi/pdf/10.1118/1.594711",
      "content-type": "unspecified",
      "content-version": "vor",
      "intended-application": "similarity-checking"
    }
  ],
  "deposited": {
    "date-parts": [
      [
        2023,
        10,
        3
      ]
    ],
    "date-time": "2023-10-03T13:15:28Z",
    "timestamp": 1696338928000
  },
  "score": 1,
  "resource": {
    "primary": {
      "URL": "https://aapm.onlinelibrary.wiley.com/doi/10.1118/1.594711"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        1980,
        7
      ]
    ]
  },
  "references-count": 0,
  "journal-issue": {
    "issue": "4",
    "published-print": {
      "date-parts": [
        [
          1980,
          7
        ]
      ]
    }
  },
  "alternative-id": [
    "10.1118/1.594711"
  ],
  "URL": "http://dx.doi.org/10.1118/1.594711",
  "relation": {},
  "ISSN": [
    "0094-2405",
    "2473-4209"
  ],
  "subject": [],
  "container-title-short": "Medical Physics",
  "published": {
    "date-parts": [
      [
        1980,
        7
      ]
    ]
  }
}