Table 1.
Effect of PVA is analyzed by calculating the number of successful fibers that connect starting and terminating gray matter regions in the simulated bundles. q1 and q2 are the number of fibers that start from bundles 1 and 2. The results for the improved Bayesian approach are the mean value of the number of fibers over five runs. The terminated fibers at the other end of the respective bundle are presented in the second row. The coefficient of misclassification is in the third row and the best values for each case are shown in bold font.
| Method | SNR=10 | SNR=20 | SNR=30 | SNR=40 | SNR=50 | SNR=60 | SNR=70 | SNR=80 | |
|---|---|---|---|---|---|---|---|---|---|
| q1+q2 | q1+q2 | q1+q2 | q1+q2 | q1+q2 | q1+q2 | q1+q2 | q1+q2 | ||
| Improved Bayesian | Start | 55.8+61.4 | 70.9+73.4 | 66.9+74.8 | 64.8+70.5 | 65.6+62.5 | 75.4+82.1 | 64.6+83.0 | 86.7+94.4 |
| Terminate | 63.5+52.3 | 72.6+70.9 | 68.4+72.8 | 63.1+72.4 | 63.8+64.1 | 76.4+80.7 | 64.2+83.4 | 88.1+94.1 | |
| Mean Cmc | 0.1433 | 0.0291 | 0.0247 | 0.0266 | 0.0265 | 0.0152 | 0.0054 | 0.0094 | |
| Lu’s method | Start | 48+49 | 45+48 | 57+60 | 64+63 | 81+81 | 95+86 | 85+87 | 81+89 |
| Terminate | 50+47 | 50+43 | 51+66 | 62+65 | 79+83 | 91+90 | 80+92 | 78+92 | |
| Cmc | 0.0412 | 0.1075 | 0.1026 | 0.0315 | 0.0247 | 0.0552 | 0.0581 | 0.0353 | |
| Friman’s method | Start | 49+57 | 50+59 | 61+65 | 67+59 | 82+85 | 88+76 | 84+83 | 78+85 |
| Terminate | 56+40 | 53+56 | 57+69 | 60+66 | 79+88 | 86+78 | 79+88 | 76+87 | |
| Cmc | 0.1458 | 0.0550 | 0.0634 | 0.1904 | 0.0359 | 0.0243 | 0.0598 | 0.0245 | |
| Euler’s method | Start | 24+29 | 26+27 | 30+37 | 43+41 | 56+65 | 60+59 | 79+67 | 71+73 |
| Terminate | 28+25 | 30+23 | 27+40 | 47+37 | 58+63 | 59+60 | 76+70 | 72+72 | |
| Cmc | 0.1509 | 0.1509 | 0.0896 | 0.0952 | 0.0331 | 0.0168 | 0.0411 | 0.0139 |