| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Krypton Radioisotopes | 100 | + | |
| 2 | Thallium Radioisotopes | 87 | + | |
| 3 | Carbon Radioisotopes | 24 | + | |
| 4 | Sodium Radioisotopes | 23 | + | |
| 5 | Tritium | 22 | + | |
| 6 | Iodine Radioisotopes | 19 | + | |
| 7 | Nitrogen Radioisotopes | 16 | + | |
| 8 | Fluorine Radioisotopes | 14 | + | |
| 9 | Phosphorus Radioisotopes | 14 | + | |
| 10 | Indium Radioisotopes | 10 | + | |
| 11 | Calcium Radioisotopes | 9 | + | |
| 12 | Rubidium Radioisotopes | 9 | + | |
| 13 | Xenon Radioisotopes | 8 | + | |
| 14 | Oxygen Radioisotopes | 7 | + | |
| 15 | Radioactive Tracers | 7 | + | |
| 16 | Gallium Radioisotopes | 5 | + | |
| 17 | Iron Radioisotopes | 4 | + |