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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