Cross-Comparison Between Systems for Images with Attenuation Correction
| Systems 1 and 2 software | System 3 software | System 4 software | System 5 software | |||||
| SPECT system | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) |
| System 1 | 62.42 | 1.7 | 68.99 | 1.72 | 62.06 | 1.84 | 55.4 | 1.74 |
| System 2 | 71.82 | 1.57 | 69.62 | 1.88 | 68.47 | 1.79 | 65.62 | 1.6 |
| System 3 | 73.99 | 1.57 | 83.02 | 1.55 | 71.2 | 1.73 | 96.25 | 2.13 |
| System 4 | 64.92 | 2.09 | 68.87 | 2.02 | 59.87 | 2.22 | 71.02 | 2.13 |
| System 5 | 43.61 | 1.69 | 49.74 | 1.66 | 44.59 | 1.69 | 45.73 | 1.66 |