Table 1 Radial, tangential, and axial spatial resolutions in terms of full width half maximum (FWHM) and the full width tenth maximum (FWTM) in mm at 1, 10 and 20 cm radial offset for the Discovery MI and DMI-DR systems with different reconstruction algorithms (filter back projection (FBP), VPHD (3D OSEM), and VPHD-S (3D OSEM + PSF)
(mm) | FBP reconstruction algorithm | VPHD (3D OSEM) reconstruction algorithm | VPHD-S (3D OSEM + PSF) reconstruction algorithm | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Discovery MI | Discovery MI-DR | Discovery MI | Discovery MI-DR | Discovery MI | Discovery MI-DR | |||||||
FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | |
1-cm radial offset | ||||||||||||
Radial | 4.62 | 8.95 | 4.58 | 8.31 | 3.85 | 7.63 | 4.13 | 8.00 | 2.70 | 5.08 | 2.84 | 5.15 |
Tangential | 4.18 | 8.65 | 4.52 | 6.41 | 3.77 | 7.75 | 3.89 | 7.79 | 2.69 | 5.12 | 2.82 | 5.15 |
Axial | 4.57 | 10.42 | 5.31 | 12.03 | 4.07 | 9.91 | 4.87 | 11.59 | 3.01 | 5.61 | 3.69 | 7.86 |
10-cm radial offset | ||||||||||||
Radial | 5.56 | 10.58 | 5.43 | 10.35 | 4.68 | 8.83 | 4.69 | 9.19 | 2.78 | 5.16 | 2.64 | 4.88 |
Tangential | 4.69 | 9.32 | 4.90 | 9.47 | 3.91 | 7.87 | 3.98 | 8.04 | 2.77 | 5.15 | 2.72 | 5.05 |
Axial | 6.05 | 11.70 | 5.58 | 12.04 | 4.92 | 9.12 | 4.37 | 10.30 | 4.15 | 7.51 | 3.50 | 6.84 |
20-cm radial offset | ||||||||||||
Radial | 7.39 | 14.23 | 7.16 | 13.04 | 7.26 | 12.78 | 6.83 | 12.22 | 3.14 | 5.79 | 3.00 | 5.60 |
Tangential | 5.08 | 9.28 | 4.82 | 9.46 | 4.16 | 8.07 | 4.06 | 8.14 | 2.90 | 5.31 | 2.75 | 5.14 |
Axial | 6.05 | 12.00 | 5.91 | 12.31 | 4.56 | 9.64 | 4.66 | 11.03 | 3.43 | 7.15 | 3.60 | 7.07 |