Figure 1

Example of raw data obtained from this study. Panel A shows the MRI scan (third echo of the Multi-Gradient-Echo scan). Some dark bands are observable in the grey matter, and indicated by white arrows. Panel B shows the smoothed EPR spectrum obtained from the same subject. Panel C illustrates the IRM data measured with the SQUID magnetometer at 100 K (red curve), showing the presence of magnetite/maghemite, and 5 K (blue curve), attributed to the presence of ferritin.