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Relaxivity values for dispersions of the obtained SPIONs and the commercial MRI contrast agent (FeREX)
| Sample | r 1 (mM−1 s−1) | r 2 (mM−1 s−1) |
|---|---|---|
| SPION1 | 1.99 ± 0.45 | 227 ± 36 |
| SPION3 | 1.72 ± 0.19 | 128 ± 10 |
| SPION1/ACh | 1.56 ± 0.19 | 369 ± 3 |
| FeREX | 1.93 ± 0.16 | 141 ± 13 |
