Fig. 1. a) Phantom MPI scan with known amounts of mPEG NP (94.3 μg–5 μg). Scale bar unit (a.u.). (b) Representative TEM of core NP. (c) Standard curves of known iron amounts and corresponding MPI signal generated for each of the 3 ROI methods. (d–e) PSF derived from MPI RELAX scan of mPEG NP. (d) MPI sensitivity of mPEG NP with signal normalized to iron amount. (e) Resolution of mPEG NP with calculated from the full-width half-maximum value of the PSF.
