Table 2

Results of relaxometry forthree nanoparticle contrast agentsand Gd-DTPA
Nanoparticle r2/r1 r2(mM−1s−1) r1(mM−1s−1)
Gd-DTPA 1.13 5.14 4.55
Gd2O3-DEG 0.89 11.81 13.31
SPGO-mPEG-silane550 33.34 26.34 0.79
SPGO-mPEG-silane2000 33.72 33.72 1.00

Longitudinal relaxivity (r1) of Gd-DTPA PEGylated nanoparticles (SPGO-mPEG-silane550 and 2000) was smaller than that of Gd2O3-DEG.

Azizian et al.

Azizian et al. Nanoscale Research Letters 2012 7:549   doi:10.1186/1556-276X-7-549

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