Table 1.
Modified breast tissue equivalent phantom characterization
| Standard phantom | 1 mm slant | 2 mm slant | 3 mm slant | 4 mm slant | |||||
|---|---|---|---|---|---|---|---|---|---|
|
mean (SD) |
range (cm) |
mean (SD) |
range (cm) |
mean (SD) |
range (cm) |
mean (SD) |
range (cm) |
mean (SD) |
range (cm) |
| 0.012 (0.005) |
1 | -0.005 (0.008) |
1.7-1.8 | -0.004 (0.010) |
1.6-1.8 | 0.005 (0.009) |
1.5-1.8 | -0.008 (0.008) |
1.4-1.8 |
| 0.009 (0.006) |
2 | -0.009 (0.008) |
2.7-2.8 | -0.010 (0.008) |
2.6-2.8 | -0.011 (0.009) |
2.1-2.4 | -0.022 (0.006) |
2.4-2.8 |
| 0.003 (0.006) |
3 | -0.010 (0.008) |
3.2-3.3 | -0.015 (0.008) |
3.1-3.3 | -0.021 (0.009) |
3.1-3.4 | -0.027 (0.007) |
3.0-3.4 |
| -0.016 (0.006) |
4 | -0.018 (0.008) |
3.7-3.8 | -0.022 (0.008) |
3.6-3.8 | -0.035 (0.011) |
3.5-3.8 | -0.038 (0.009) |
3.5-3.9 |
| -0.023 (0.009) |
5 | -0.025 (0.009) |
4.7-4.8 | -0.029 (0.009) |
4.6-4.8 | -0.046 (0.013) |
4.5-4.8 | -0.049 (0.013) |
4.4-4.8 |
| -0.032 (0.012) |
6 | -0.028 (0.010) |
5.3-5.4 | -0.034 (0.011) |
5.2-5.4 | -0.051 (0.015) |
5.3-5.6 | -0.0632 (0.018) |
5.4-5.8 |
The difference image, d(x, y), distribution quantities for the four slanted-plane glandular equivalent phantoms and for the standard (zero-slant) phantom are provided. The 1-4 mm slant entries (top row) refer to z in Figure 1. The mean value and standard deviation (SD) for the d(x, y) difference metric [see Eq. (12)] pixel distributions are provided for each total phantom height and type expressed in cm. The range column gives the total phantom height change measured from the breast support surface to the front-edge and back-edge of each phantom configuration, respectively.