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![Magnetic nanotechnologies for early cancer diagnostics with liquid biopsies: a review](https://image.oaes.cc/7f7a567e-03f0-4844-8ee9-e64684ca911f/3543.fig.7.jpg)
Figure 7. Schematic view of longitudinal magnetization components after the application of a 90° rf pulse. The longitudinal component Mz recovers to equilibrium value through an exponential process (A); Longitudinal relaxation time T1 at which the Mz recovers to 63% of its equilibrium value (B)[82] (reprinted with permission from IOP Publishing, Ltd)