Results from Spatial Resolution Measurements with Point Source
| Reconstruction profile type | FORE/FBP | 3D-FRP | ||||
|---|---|---|---|---|---|---|
| Wide | Narrow | Wide | Narrow | |||
| Source radial position, 1 cm | ||||||
| Transverse FWHM (mm) | 5.54 | 4.64 | 5.49 | 3.77 | ||
| Axial FWHM (mm) | 5.63 | 5.23 | 5.78 | 5.31 | ||
| Transverse FWTM (mm) | 10.59 | 9.29 | 10.70 | 8.98 | ||
| Axial FWTM (mm) | 11.32 | 11.15 | 11.58 | 11.19 | ||
| Source radial position, 10 cm | ||||||
| Transverse FWHM (mm) | 5.65 | 5.36 | 5.66 | 5.46 | ||
| Axial FWHM (mm) | 7.45 | 6.82 | 6.71 | 6.44 | ||
| Transverse FWTM (mm) | 10.54 | 10.10 | 11.18 | 10.85 | ||
| Axial FWTM (mm) | 13.39 | 12.74 | 12.44 | 11.94 | ||
| Source radial position, 15 cm | ||||||
| Transverse FWHM (mm) | 7.17 | 7.16 | 6.79 | 6.78 | ||
| Axial FWHM (mm) | 7.92 | 7.65 | 8.55 | 15.74 | ||
| Transverse FWTM (mm) | 13.86 | 13.77 | 13.59 | 13.44 | ||
| Axial FWTM (mm) | 14.47 | 13.94 | 8.94 | 16.78 | ||
| Source radial position, 20 cm | ||||||
| Transverse FWHM (mm) | 7.90 | 7.73 | 7.69 | 7.62 | ||
| Axial FWHM (mm) | 9.68 | 10.15 | 8.47 | 15.48 | ||
| Transverse FWTM (mm) | 15.29 | 15.32 | 15.08 | 14.94 | ||
| Axial FWTM (mm) | 17.84 | 18.18 | 8.80 | 16.54 | ||
Wide profile is based on NEMA NU 2-2001 standard (2), where width of 1D response functions in 2 directions at right angles to direction of measurement is ∼2 times FWHM. Narrow profile is based on NEMA NU 2-1994 standard (18), where width of 1D response functions in 2 directions at right angles to direction of measurement is ∼2 mm.