Contrast and RMS Results for Images with Attenuation Correction
| System 1 | System 2 | System 3 | System 4 | System 5 | ||||||
| Protocol | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) | Contrast (%) | RMS (%) |
| Brain (CO) (zoom) | 69.97 (z = 1.46) | 4.13 (z = 1.46) | 73.31 (z = 1.28) | 10.99 (z = 1.28) | 52.99 (z = 1.45) | 2.92 (z = 1.45) | 62.07 | 10.72 | 42.09 (z = 1.46) | 4.72 (z = 1.45) |
| Brain (NCO) | 61.79 | 2.39 | — | — | 44.35 | 2.16 | 67.71 | 10.21 | — | — |
| Brain (NCO) (zoom) | 56.94 (z = 1.46) | 4.81 (z = 1.46) | — | — | 59.77 (z = 1.45) | 3.59 (z = 1.45) | — | — | — | — |
| General SPECT (CO) | 56.94 | 4.81 | 47.85 | 1.97 | 70.52 | 2.93 | 70.62 | 6.88 | 47.84 | 5.2 |
| General SPECT(NCO) | 62.5 | 4.86 | — | — | 79.73 | 3.02 | 73.02 | 7.27 | — | — |
CO = circular orbit; NCO = noncircular orbit.