Table 1 Molybdenum/Molybdenum regression distribution quantities. Quantities are summaries of the field of view: μ is the mean effective x-ray attenuation coefficient, σ is the standard deviation of the μ distribution, Δ is the mean variation in μ derived from averaging the individual regression variation, l is the mean logarithmic intercept, σ l is the standard deviation of the l distribution, and R2 is the mean of the associated distribution. Two sided 95% mean confidence interval is cited under the respective μ and l quantities. Location is indicated by the subscripts of the left hand column entries. Parenthetical FL entries indicate the absolute value percent difference between respective location quantities.
Mo/Mo 26 kVp | μ | σ | Δ | l | σl | R2 |
|---|---|---|---|---|---|---|
FatFL | 0.572 | 0.001 | 0.005 | 5.093 | 0.010 | 0.998 |
|  | 0.557–0.586 (1.9%) |  |  | 5.03–5.15 (2.6%) |  |  |
FatKS | 0.583 | 0.001 | 0.005 | 4.964 | 0.010 | 0.998 |
|  | 0.568–0.599 |  |  | 4.89–5.03 |  |  |
GlandFL | 0.833 | 0.002 | 0.015 | 4.893 | 0.001 | 0.998 |
|  | 0.784–0.882 (0.60%) |  |  | 4.68–5.10 (2.6%) |  |  |
GlandKS | 0.838 | 0.010 | 0.012 | 4.767 | 0.020 | 0.998 |
|  | 0.799–0.877 |  |  | 4.60–4.93 |  |  |
Mo/Mo 27 kVp | μ | σ | Δ | l | σl | R2 |
FatFL | 0.559 | 0.001 | 0.005 | 5.262 | 0.010 | 0.999 |
|  | 0.544–0.575 (2.1%) |  |  | 5.19–5.32 (1.8%) |  |  |
FatKS | 0.571 | 0.001 | 0.005 | 5.165 | 0.010 | 0.999 |
|  | 0.554–0.586 |  |  | 5.09–5.16 |  |  |
GlandFL | 0.805 | 0.003 | 0.020 | 5.043 | 0.010 | 0.998 |
|  | 0.750–0.860 (0.40%) |  |  | 4.81–5.28 (1.9%) |  |  |
GlandKS | 0.808 | 0.005 | 0.014 | 4.950 | 0.020 | 0.999 |
|  | 0.763–0.854 |  |  | 4.75–5.14 |  |  |