Magnetic Particle Imaging in Vascular Imaging, Immunotherapy, Cell Tracking, and Noninvasive Diagnosis

Table 1

Commercially available SPIO tracers used for MPI had their resolution and sensitivity measured using an arbitrary wave relaxometer [1, 40] (reproduced with permission from Chandrasekharan et al. [1]).

Commercial particles	Crystal phase/size	MPI resolution/sensitivity
Feraheme	γ-Fe2O3 Maghemite/6-7 nm	5.6 mm/77 ng
Resovist (Ferucarbotran)	Magnetite (Fe3O4) & Maghemite (Fe2O3)/3-5 nm	1.4 mm/12 ng
LodeSpin lab	Magnetite (Fe3O4)/29 nm	0.83 mm/3 ng
Superferromagnetic particles	Interacting	~0.1 mm/10-fold better sensitivity [40]