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. 2015 Jun 3;5:10842. doi: 10.1038/srep10842

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Normalised response curve of a point-source phantom (centred at x = 0) scanned at a height of 1.0 mm. A probe spatial resolution of 4.0 mm can be determined from the response curve’s FWHM, which is considerably less than that of a coil magnetometer or gamma probe.