| TheraSphere® | SIR-Spheres® |
Radioactive Substance Material | Yttrium 90 glass | Yttrium 90 resin-based |
Microsphere size | 20 - 30 µm | 20 - 60 µm |
Activity per sphere | 2500 Bq | 50 Bq |
Dosimetry calculations | partition model | BSA model |
Costs | 13,000 US$ | 14,000 US$ |