Biomagnetic Imaging Using Arrays Of SQUIDs

Robert E. Alvarez

doi:10.1117/12.953186

1 May 1989 Biomagnetic Imaging Using Arrays Of SQUIDs

Robert E. Alvarez

Proceedings Volume 1090, Medical Imaging III: Image Formation; (1989) https://doi.org/10.1117/12.953186
Event: Medical Imaging III, 1989, Newport Beach, CA, United States

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.

Citation Download Citation

Robert E. Alvarez "Biomagnetic Imaging Using Arrays Of SQUIDs", Proc. SPIE 1090, Medical Imaging III: Image Formation, (1 May 1989); https://doi.org/10.1117/12.953186

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