Table 1.
The above chart shows the calculated size of the width of the regions used for calculation of the average peak and trough values. These widths are dependent on the line pair values and therefore frequency.
| Line Pair Frequencies in Bar Phantom (lp/mm) | FPD ROI Width (Pix) | MAF ROI Width (Pix) | FPD Rounded Width (Pix) | MAF Rounded Width (Pix) |
|---|---|---|---|---|
| 0.6 | 6.14 | 34.01 | 6 | 34 |
| 0.7 | 5.26 | 29.15 | 5 | 29 |
| 0.8 | 4.60 | 25.51 | 4 | 25 |
| 0.9 | 4.09 | 22.68 | 4 | 22 |
| 1 | 3.68 | 20.41 | 3 | 20 |
| 1.2 | 3.07 | 17.01 | 3 | 17 |
| 1.4 | 2.63 | 14.58 | 2 | 14 |
| 1.6 | 2.30 | 12.76 | 2 | 12 |
| 1.8 | 2.05 | 11.34 | 2 | 11 |
| 2 | 1.84 | 10.20 | 1 | 10 |
| 2.2 | 1.67 | 9.28 | 1 | 9 |
| 2.5 | 1.47 | 8.16 | 1 | 8 |
| 2.8 | 1.31 | 7.29 | 1 | 7 |
| 3.1 | 1.19 | 6.58 | 1 | 6 |
| 3.4 | 1.08 | 6.00 | 1 | 6 |
| 3.7 | 1.00 | 5.52 | 1 | 5 |
| 4 | 0.92 | 5.10 | N/A | 5 |
| 4.3 | 0.86 | 4.75 | N/A | 4 |
| 4.6 | 0.80 | 4.44 | N/A | 4 |
| 5 | 0.74 | 4.08 | N/A | 4 |