| TheraSphere® | SIR-Spheres® | |
|---|---|---|
| Material | Glass-based | Resin-based |
| Diameter | 20-30 μm | 20-60 μm |
| Activity per sphere | 2500 Bq | 50 Bq |
| Specific gravity | 3.2 g/ml | 1.6 g/ml |
| Relative embolic potential | Low | High |
| Relative pressure for infusion | High | Low |
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