Ratio of Specific Signal for HABs, MABs, and LABs with Different TSPO Ligands
| Ligand | LAB | MAB | HAB |
| PBR28 | 1 | 28.2 | 55.3 |
| PBR06 | 1 | 9.2 | 17.3 |
| DAA1106 | 1 | 2.9 | 4.7 |
| PBR111 | 1 | 2.5 | 4.0 |
| DPA173 | 1 | 2.7 | 4.4 |
| PK11195 | 1 | 0.9 | 0.8 |
MABs are assumed to express equal number of HAB and MAB sites. Receptor density is assumed to remain constant. Values are calculated as BPND relative to BPND of LABs.