Table 2.
Mean attenuation coefficient frequency dependence fit residual (dB/cm) for the test phantom in terms of imaging position and window size. Values are reported with and without use of the segmentation algorithm for orientation A (leek pieces towards the bottom) and orientation B (leek pieces towards the top). Values in bold font represent lower residual when comparing between segmented and non-segmented results.
|
Mean frequency fit residual - Orientation A (dB/cm) |
Mean frequency fit residual - Orientation B (dB/cm) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Position |
30 cycles |
18 cycles |
12 cycles |
30 cycles |
18 cycles |
12 cycles |
||||||
| Non-Seg. | Seg. | Non-Seg. | Seg. | Non-Seg. | Seg. | Non-Seg. | Seg. | Non-Seg. | Seg. | Non-Seg. | Seg. | |
| 1 | 0.089 | 0.089 | 0.055 | 0.055 | 0.038 | 0.038 | 0.110 | 0.099 | 0.085 | 0.067 | 0.081 | 0.075 |
| 2 | 0.261 | 0.132 | 0.244 | 0.126 | 0.068 | 0.059 | 0.094 | 0.108 | 0.082 | 0.076 | 0.077 | 0.070 |
| 3 | 1.539 | 0.170 | 1.052 | 0.237 | 0.341 | 0.043 | 0.108 | 0.156 | 0.085 | 0.097 | 0.093 | 0.095 |
| 4 | 0.476 | 0.213 | 0.363 | 0.182 | 0.282 | 0.133 | 0.148 | 0.123 | 0.116 | 0.060 | 0.078 | 0.040 |
| 5 | 0.791 | 0.223 | 0.738 | 0.210 | 0.264 | 0.123 | 0.098 | 0.239 | 0.067 | 0.142 | 0.057 | 0.133 |
| 6 | 0.459 | 0.132 | 0.530 | 0.121 | 0.538 | 0.052 | 0.130 | 0.115 | 0.070 | 0.064 | 0.045 | 0.061 |
| 7 | 0.077 | 0.129 | 0.130 | 0.096 | 0.045 | 0.054 | 0.071 | 0.114 | 0.067 | 0.105 | 0.048 | 0.051 |
| Mean | 0.527 | 0.155 | 0.444 | 0.147 | 0.225 | 0.072 | 0.108 | 0.136 | 0.082 | 0.087 | 0.068 | 0.075 |