| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Strontium Radioisotopes | 100 | + | |
| 2 | Tritium | 48 | + | |
| 3 | Tin Radioisotopes | 37 | + | |
| 4 | Iodine Radioisotopes | 33 | + | |
| 5 | Thallium Radioisotopes | 24 | + | |
| 6 | Carbon Radioisotopes | 23 | + | |
| 7 | Phosphorus Radioisotopes | 22 | + | |
| 8 | Radioactive Tracers | 12 | + | |
| 9 | Yttrium Radioisotopes | 7 | + | |
| 10 | Sulfur Radioisotopes | 6 | + | |
| 11 | Ruthenium Radioisotopes | 5 | + | |
| 12 | Gallium Radioisotopes | 4 | + | |
| 13 | Fluorine Radioisotopes | 4 | + |