MR signal intensity for T1 relaxation. MR signal intensity as a function of the time of inversion is shown for two representative concentrations of nanoparticles. The T1 relaxation in the 0.427-mM sample was faster than that of the 4.27-mM sample.
Bae et al. Nanoscale Research Letters 2012 7:44 doi:10.1186/1556-276X-7-44