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| Type of SPION | Percentage of injected dose present in the blood after 15 min |
|---|---|
| Dextran coated | 50%37 |
| PVA-SPION positive | 45.4 ± 9.8% |
| PVA-SPION neutral | 87.1 ± 3.7% |
| PVA-SPION negative | 85.6 ± 3.2% |
