Ferromagnetic sensing method and apparatus
作者： William Avrin , Richard McClure , R. Massengill
DOI:
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摘要: A method and apparatus for sequentially exposing a region of patient to low level DC magnetic field, first without movement the null sensing apparatus, then with detect synchronous changes in detected signal, indicative ferromagnetic foreign body region. The nulling signal detection can take place at plurality test zone set points increasing magnitudes applied field. be nulled each point prior introduction patient.
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