Skip to main content
. 2021 Mar;111:106302. doi: 10.1016/j.ultras.2020.106302

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