Evaluation of Particle Size
| Sample | n | Average particle size (nm) | Minimum particle size (nm) | Maximum particle size (nm) |
| Unfiltered 99mTc-sulfur colloid | 21 | 253 ± 192 | 31 | 857 |
| Filtered 99mTc-sulfur colloid | 41 | 71 ± 41 | 19 | 167 |
| Mixture of filtered 99mTc-sulfur colloid and green dye at 0 h | 365 | 53 ± 30 | 9 | 156 |
| Mixture of filtered 99mTc-sulfur colloid and green dye at 2 h | 303 | 60 ± 35 | 12 | 193 |