Detection of brainstem auditory evoked magnetic fields using a SQUID magnetometer with a variable baseline

Keiji Iramina, Shinichi Uchizono, Shoogo Ueno

Research output: Contribution to journalArticlepeer-review

Abstract

This study focuses on the detection of ABR magnetic fields using a SQUID magnetometer with a variable baseline. We developed a highly sensitive dc-SQUID system. The SQUID magnetometer has a first-order gradiometer with a variable baseline, i.e., the distance between two co-axial coils. ABR signals, which are generated from a brainstem in a deep part of the brain, are very weak fields. We measured the ABR magnetic fields using three gradiometers which have different baselines: 30 mm, 50 mm and 80 mm. In this experiment, we were able to obtain the best signal-to-noise ratio using the gradiometer with the 50 mm baseline.

Original languageEnglish
Pages (from-to)175-176
Number of pages2
JournalUnknown Journal
Volume16
Issue numberpt 1
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Bioengineering

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