SQUID systems for biomagnetic imaging

Authors: Pizzella, V.1; Penna, S.D.2; Gratta, C.D.1; Romani, G.L.1

Source: Superconductor Science and Technology, Volume 14, Number 7, 2001 , pp. R79-R114(36)

Publisher: IOP Publishing

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This review paper illustrates the different SQUID based systems used for biomagnetic imaging. The review is divided into nine sections. The first three sections are introductory: section 1 is a short overview of the topic; section 2 summarizes how the biomagnetic fields are generated and what are the basic mathematical models for the field sources; section 3 illustrates the principles of operation of the SQUID device. Sections 4-8 are specifically devoted to the description of the different systems used for biomagnetic measurements: section 4 discusses the different types of detection coils; section 5 illustrates the SQUID sensors specifically designed for biomagnetic applications together with the necessary driving electronics, with special emphasis on high-temperature superconductivity (HTS) SQUIDs, since HTS devices are still in a developing stage; section 6 illustrates the different noise reduction techniques; section 7 describes the different multichannel sensors presently operating; and, finally, section 8 gives a hint of what kind of physiological and/or clinical information may be gathered by the biomagnetic technique. Section 9 suggests some future trends for the biomagnetic technique.

Document Type: Miscellaneous

Affiliations: 1: Department of Clinical Sciences and Biomedical Imaging, University of Chieti, Italy 2: Institute of Advanced Biomedical Technologies, University of Chieti, Italy

Publication date: January 1, 2001

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