Table 5.
Noise (SD) and spatial frequency (mm−1) of the peak amplitude of the noise power spectrum (NPS). Averaged noise results from 200 images per phantom type, dose, and image reconstruction are presented along with 95% confidence intervals
| 1.4 mGy FBP | 1.4 mGy AIDR 3D | 5.6 mGy FBP | 5.6 mGy AIDR 3D | |
|---|---|---|---|---|
|
Noise (SD) Uniform |
26.33 (26.15 to 26.51) |
13.89 (13.77 to 14) |
12.79 (12.7 to 12.88) |
9.8 (9.72 to 9.88) |
|
Noise (SD) Anatomical |
39.79 (39.5 to 40.08) |
23.76 (23.54 to 23.98) |
27.52 (27.28 to 27.75) |
23.5 (23.27 to 23.74) |
|
Spatial frequency of peak NPS (mm−1) Uniform |
0.28 | 0.23 | 0.29 | 0.28 |
|
Spatial frequency of peak NPS (mm−1) Anatomical |
0.12 | 0.12 | 0.12 | 0.12 |