Table 2 Evaluated reconstruction settings for the phantom PET scans for both 8:1 and 4:1 activity concentration
From: Image quality and detectability in Siemens Biograph PET/MRI and PET/CT systems—a phantom study
System | Reconstruction algorithm | Iterations | Subsets | Matrix [pixels] | Voxel size [mm] | PET acquisition time [s] | Filter |
|---|---|---|---|---|---|---|---|
PET/CT | OSEM | 1–8 | 24 | 400 × 400 | 2.0 × 2.0 × 2.0 | 150 | 4 mm Gauss |
OSEM&PSF | |||||||
OSEM&TOF | 21 | ||||||
OSEM&TOF&PSF | |||||||
3 | 128 × 128 | 6.4 × 6.4 × 2.0 | |||||
200 × 200 | 4.1 × 4.1 × 2.0 | ||||||
256 × 256 | 3.2 × 3.2 × 2.0 | ||||||
512 × 512 | 1.6 × 1.6 × 2.0 | ||||||
1–8 | 400 × 400 | 2.0 × 2.0 × 2.0 | 2 mm Gauss | ||||
No filter | |||||||
3 | 60, 120, 180, 240, 300 | 4 mm Gauss | |||||
PET/MRI | OSEM | 1–8 | 21 | 344 × 344 | 2.1 × 2.1 × 2.0 | 97 | 4 mm Gauss |
OSEM&PSF | |||||||
3 | 128 × 128 | 5.6 × 5.6 × 2.0 | |||||
172 × 172 | 4.2 × 4.2 × 2.0 | ||||||
256 × 256 | 2.8 × 2.8 × 2.0 | ||||||
512 × 512 | 1.4 × 1.4 × 2.0 | ||||||
344 × 344 | 2.1 × 2.1 × 2.0 | 2 mm Gauss | |||||
No filter | |||||||
60, 120, 180, 240, 300, 360, 420, 480, 540, 600 | 4 mm Gauss |