Detection of biological signals from a live mammalian muscle using an early stage diamond quantum sensor

  title={Detection of biological signals from a live mammalian muscle using an early stage diamond quantum sensor},
  author={James L. Webb and Luca Troise and Nikolaj Winther Hansen and Christoffer Olsson and Adam M. Wojciechowski and Jocelyn Achard and O. Brinza and Robert Staacke and Michael Kieschnick and Jan Meijer and Axel Thielscher and Jean-François Perrier and Kirstine Berg-S{\o}rensen and Alexander Huck and Ulrik Lund Andersen},
  journal={Scientific Reports},
The ability to perform noninvasive and non-contact measurements of electric signals produced by action potentials is essential in biomedicine. A key method to do this is to remotely sense signals by the magnetic field they induce. Existing methods for magnetic field sensing of mammalian tissue, used in techniques such as magnetoencephalography of the brain, require cryogenically cooled superconducting detectors. These have many disadvantages in terms of high cost, flexibility and limited… 

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A background suppression figure of merit is introduced for characterizing the performance of gradiometers and allows for optimally setting the measurement baseline and for quickly assessing the advantage, if any, of performing a measurement in a gradiometric mode.