Table 4 Contrast, variability, and average lung residual for 8:1 sphere-to-background ratio
From: Performance evaluation of a new high-sensitivity time-of-flight clinical PET/CT system
Sphere Size (mm) | Contrast (%) | Background variability (%) | ||||||
|---|---|---|---|---|---|---|---|---|
Non-TOF | Non-TOF-PSF | TOF | TOF-PSF | Non-TOF | Non-TOF-PSF | TOF | TOF-PSF | |
10 | 34.3 | 33.9 | 41.0 | 38.2 | 4.0 | 4.1 | 4.6 | 4.7 |
13 | 47.4 | 48.2 | 54.2 | 53.0 | 3.7 | 3.8 | 4.4 | 4.6 |
17 | 60.2 | 61.5 | 65.8 | 64.9 | 3.4 | 3.4 | 4.3 | 4.4 |
22 | 70.3 | 72.0 | 74.4 | 74.4 | 2.9 | 3.0 | 4.3 | 4.4 |
28 | 65.6 | 62.7 | 73.0 | 71.0 | 2.4 | 2.6 | 4.2 | 4.4 |
37 | 70.2 | 67.6 | 76.4 | 74.7 | 2.0 | 2.3 | 4.4 | 4.6 |
Lung residual (%) | 26.4 | 27.8 | 14.9 | 15.4 | ||||