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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: Biomaterials. 2013 Feb 21;34(15):3837–3845. doi: 10.1016/j.biomaterials.2013.01.087

Figure 1.

Figure 1

Schematic illustration of magnetic nanoparticle detection in MPS. (a) The characteristic nonlinear magnetization response of superparamagnetic nanoparticles to an applied field. (b) MPS uses an AC-field, H(t), to magnetize MNTs, m(H(t)), and induce a time-varying signal, m′(H(t)), in the receive coil. The resulting particle response function (PRF), shown in (c), is a fundamental property of MNTs.