Ultra-low-field MRI and its combination with MEG

Lauri Parkkonen*, Risto J. Ilmoniemi, Fa Hsuan Lin, Michelle Espy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review


Recent progress in SQUID instrumentation has demonstrated the feasibility of using SQUID sensor arrays in MEG helmets to record also MRI data. Here we describe the basic principles of MRI as well as the special requirements and solutions needed to perform ultra-low-field MRI concurrently with MEG. We consider it is feasible to build practical MEG-MRI instruments for scientific experimentation and for clinical use. Acquiring an MRI with 2-mm spatial resolution and sufficient signal-to-noise ratio and contrast appears achievable without essentially lengthening the normal MEG measurement time.

Original languageEnglish
Title of host publicationMagnetoencephalography
Subtitle of host publicationFrom Signals to Dynamic Cortical Networks: Second Edition
PublisherSpringer International Publishing Switzerland
Number of pages33
ISBN (Electronic)9783030000875
ISBN (Print)9783030000868
Publication statusPublished - 17 Oct 2019
MoE publication typeA3 Part of a book or another research book


  • Magnetic resonance imaging
  • Magnetoencephalography
  • Ultra-low-field MRI

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    Parkkonen, L., Ilmoniemi, R. J., Lin, F. H., & Espy, M. (2019). Ultra-low-field MRI and its combination with MEG. In Magnetoencephalography: From Signals to Dynamic Cortical Networks: Second Edition (2nd ed., pp. 1261-1293). Springer International Publishing Switzerland. https://doi.org/10.1007/978-3-030-00087-5_46