Myocardial Retention of 11C-mHED
| Study | Equation | Regression coefficient R | Dose for half-maximum effect (nmol·kg−1) |
| Displacement by metaraminol (PET) | 4 | 0.866 | 296 |
| 5 | 0.978 | 124 | |
| Coinjection of metaraminol + 11C-mHED (PET) | 6 | 0.858 | 132 ± 59 |
| Coinjection of metaraminol + 11C-mHED (dissection) | 7 | 0.993 | 215 ± 32 |