| Imaging technique | Mean viable myocardium | Optimal threshold for viability |
| (number of studies) | %, (SD) | %, (95%C.I.) |
| PET overall (N = 7) | 21 (13) | 25.8 (16.6-35.0) |
| PET with FDG/NH3 (N = 3) | 20 (15) | 22.5 (10.1-34.8) |
| PET with FDG/Tc-99m (N = 3) | 22 (16) | 29.2 (20.7-37.8) |
| DSE overall (N = 8) | 32 (24) | 35.9 (31.6-40.3) |
| DSE with LDD (N = 4) | 33 (28) | 33.6 (27.4-39.8) |
| DSE with HDD (N = 2) | 35 (31) | 44.1 (37.2-50.9) |
| SPECT overall (N = 6) | 38 (25) | 38.7 (27.7-49.7) |
| SPECT with Tl-201 (N = 5) | 41 (35) | 38.0 (26.2-49.7) |