SQUID imaging of a subject's head after the subject having been administered superparamagnetic nanoparticles comprising: an iron-containing core, a coating covering the core and a probe molecule conjugated to the coating wherein the probe molecule locates the superparamagnetic nanoparticle to a target in the brain that is characteristic of the neurodegenerative disease; magnetizing the superparamagnetic nanoparticles using external magnetic coils; and measuring the decaying remanence magnetic fields of the superparamagnetic nanoparticles attached to the target and not from unattached superparamagnetic nanoparticles to obtain magnetic field measurements.
Biomagnetic detection and treatment of Alzheimer's Disease