Spatial Resolution Measured for PET Component of Vereos PET/CT System (NEMA NU2-2012)
| Vereos | |||||
| Parameter | Distance (cm) | FWHM (mm) | FWTM (mm) | Discovery MI FWHM (mm) (8) | mCT Flow FWHM (mm) (20) |
| Transverse | 1 | 4.24* ± 0.07 | 8.40* ± 0.15 | 4.15* | 4.33* |
| Axial | 1 | 4.17 ± 0.17 | 8.80 ± 0.21 | 4.48 | 4.25 |
| Transverse radial | 10 | 4.55 ± 0.09 | 8.87 ± 0.13 | 5.47 | 5.16 |
| Transverse tangential | 10 | 4.35 ± 0.01 | 8.97 ± 0.04 | 4.49 | 4.72 |
| Axial | 10 | 4.39 ± 0.00 | 9.08 ± 0.02 | 6.01 | 5.85 |
| Transverse radial | 20 | 5.84 ± 0.06 | 10.43 ± 0.04 | 7.53 | 5.55 |
| Transverse tangential | 20 | 4.92 ± 0.01 | 9.96 ± 0.12 | 4.90 | 6.48 |
| Axial | 20 | 4.60 ± 0.13 | 9.21 ± 0.26 | 6.10 | 7.80 |
↵* Average value of radial and tangential measurements.
FWTM = full width at tenth maximum.
Data are average ± SD of the measurements at the axial center an off center position. Reported spatial resolutions of Discovery MI (SiPM-based system with 20-cm axial FOV (8)) and mCT Flow (PMT-based system with 22.1-cm axial FOV (20)) are shown for comparison. Spatial resolution measurements for 15-cm axial FOV Discovery MI and 16.2-cm axial FOV mCT Flow are not available but are expected to be similar to those of extended-axial-FOV systems (25,35).