Table 1 Spatial resolution
From: Performance characteristics of silicon photomultiplier based 15-cm AFOV TOF PET/CT
Filtered backprojection | Non-TOF OSEM (VPHD) | Non-TOF–PSF (VPHD-S) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
FWHM (mm) | FWTM (mm) | FWHM (mm) | FWTM (mm) | FWHM (mm) | FWTM (mm) | ||||||||||
Resolution direction | Radial offset | 3R (B) | 4R (S) | 4R (U) | 3R (B) | 4R (S) | 4R (U) | 3R (B) | 4R (S) | 4R (U) | 3R (B) | 4R (S) | 4R (U) | 3R (B) | 3R (B) |
Radial | 1 cm | 4.69 | 4.17 | 4.02 | 8.93 | 9.14 | 8.52 | 3.87 | 3.77 | 3.67 | 7.63 | 7.83 | 7.74 | 2.72 | 5.14 |
10 cm | 5.58 | 5.65 | 5.28 | 10.31 | 10.36 | 9.95 | 4.8 | 4.76 | 4.68 | 8.92 | 9.08 | 9.11 | 2.81 | 5.16 | |
20 cm | 7.53 | 7.52 | 7.54 | 13.51 | 13.88 | 13.38 | 7.38 | 7.36 | 7.44 | 13.10 | 12.99 | 13.27 | 2.97 | 5.58 | |
NS vs FBP | NS vs FBP | NS vs FBP | NS vs FBP | * vs FBP | NS vs FBP | * vs FBP NS vs VPHD | * vs FBP * vs VPHD | ||||||||
Tangential | 1 cm | 4.08 | 4.40 | 3.97 | 8.42 | 9.17 | 8.19 | 3.69 | 4.00 | 3.74 | 7.57 | 7.95 | 7.93 | 2.69 | 5.10 |
10 cm | 4.64 | 4.74 | 4.23 | 9.42 | 9.68 | 8.83 | 3.81 | 4.01 | 3.82 | 7.69 | 8.04 | 7.86 | 2.74 | 5.06 | |
20 cm | 5.08 | 5.13 | 4.67 | 9.69 | 10.14 | 9.04 | 4.16 | 4.62 | 4.31 | 8.11 | 9.03 | 8.46 | 2.71 | 5.15 | |
NS vs FBP | * vs FBP | * vs FBP | * vs FBP | * vs FBP | NS vs FBP | ** vs FBP ** vs VPHD | ** vs FBP ** vs VPHD | ||||||||
Axial | 1 cm | 4.68 | 4.57 | 4.39 | 10.3 | 10.38 | 10.12 | 4.15 | 4.00 | 3.93 | 9.80 | 9.80 | 9.71 | 3.16 | 6.71 |
10 cm | 5.83 | 6.39 | 5.63 | 11.19 | 12.34 | 11.8 | 4.87 | 5.28 | 4.3 | 9.05 | 8.75 | 9.34 | 3.92 | 7.57 | |
20 cm | 5.47 | 6.50 | 5.70 | 11.14 | 13.01 | 12.57 | 3.98 | 4.09 | 4.01 | 9.55 | 9.71 | 9.75 | 3.07 | 6.38 | |
* vs FBP | NS vs FBP | NS vs FBP | NS vs FBP | NS vs FBP | NS vs FBP | ** vs FBP * vs VPHD | ** vs FBP * vs VPHD | ||||||||