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Proceedings Paper

Biomagnetic Imaging Using Arrays Of SQUIDs
Author(s): Robert E. Alvarez
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Paper Abstract

The magnetic lead field provides a relation between the current density distribution in the patient and the measurement of a SQUID magnetometer. This approach can be derived in a new and simple way by a derivation based on energy concepts. Using the lead field and conservation of charge conditions provides two linear, spatially invariant imaging equations relating the current density and flux measurements made by a planar array of SQUID magnetometers. These equations, plus an assumption that the current density is confined to a plane, are solved using Fourier techniques. The validity of the resulting equations is shown both analytically and with a computer model. The effects of not satisfying the planar assumption are described.

Paper Details

Date Published: 1 May 1989
PDF: 7 pages
Proc. SPIE 1090, Medical Imaging III: Image Formation, (1 May 1989); doi: 10.1117/12.953186
Show Author Affiliations
Robert E. Alvarez, Aprend Technology (United States)


Published in SPIE Proceedings Vol. 1090:
Medical Imaging III: Image Formation
Samuel J. Dwyer; R. Gilbert Jost; Roger H. Schneider, Editor(s)

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