Table 1.
Demographics and the statistics of the computer-assisted cerebral infarct segmentation results of individual patients after repeating the proposed method for 10 times.
| Patient | Sex | Age | Demar. | Total infarct volume (mL) | ΔVol. | SI (%) | Kappa (%) | Sen. (%) | Spe. (%) | PPV (%) | NPV (%) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Semi-auto. | Auto. | |||||||||||
| 1 | M | 73 | 0.27 | 0.155 | 0.212 | 36.6% | 84.661 | 84.661 | 100.000 | 99.999 | 73.529 | 100.000 |
| 2 | M | 80 | 0.19 | 0.358 | 0.377 | 5.3% | 97.438 | 97.438 | 100.000 | 100.000 | 95.014 | 100.000 |
| 3 | F | 69 | 0.21 | 0.399 | 0.381 | −4.4% | 97.716 | 97.716 | 95.556 | 100.000 | 100.000 | 100.000 |
| 4 | F | 84 | 0.22 | 0.474 | 0.378 | −20.3% | 86.835 | 86.834 | 78.037 | 100.000 | 98.349 | 99.998 |
| 5 | F | 70 | 0.2 | 0.501 | 0.337 | −32.7% | 91.662 | 91.662 | 93.398 | 100.000 | 91.723 | 100.000 |
| 6 | M | 63 | 0.19 | 0.545 | 0.451 | −17.2% | 90.413 | 90.412 | 82.764 | 100.000 | 100.000 | 99.999 |
| 7 | M | 55 | 0.2 | 0.612 | 0.471 | −22.9% | 82.684 | 82.683 | 73.190 | 100.000 | 95.072 | 99.998 |
| 8 | F | 66 | 0.15 | 0.644 | 0.479 | −25.6% | 85.332 | 85.331 | 74.436 | 100.000 | 100.000 | 99.998 |
| 9 | M | 61 | 0.21 | 0.796 | 0.895 | 12.5% | 94.143 | 94.142 | 100.000 | 99.999 | 88.938 | 100.000 |
| 10 | M | 64 | 0.19 | 1.003 | 1.019 | 1.6% | 98.927 | 98.927 | 99.710 | 100.000 | 98.171 | 100.000 |
| 11 | F | 75 | 0.25 | 1.675 | 1.794 | 7.1% | 94.373 | 94.372 | 97.619 | 99.998 | 91.568 | 99.999 |
| 12 | F | 56 | 0.19 | 1.966 | 1.497 | −23.9% | 86.438 | 86.434 | 76.140 | 100.000 | 100.000 | 99.992 |
| 13 | F | 74 | 0.31 | 2.141 | 3.232 | 51.0% | 79.722 | 79.715 | 100.000 | 99.984 | 66.312 | 100.000 |
| 14 | F | 86 | 0.14 | 3.749 | 2.228 | −40.6% | 74.359 | 74.349 | 59.444 | 100.000 | 100.000 | 99.977 |
| 15 | M | 76 | 0.19 | 4.143 | 3.448 | −16.8% | 85.827 | 85.819 | 78.898 | 99.997 | 95.789 | 99.987 |
| 16 | F | 87 | 0.17 | 10.108 | 8.351 | −17.4% | 90.453 | 90.440 | 82.621 | 100.000 | 100.000 | 99.975 |
| 17 | F | 83 | 0.16 | 12.657 | 10.088 | −20.3% | 88.603 | 88.582 | 79.662 | 100.000 | 99.952 | 99.958 |
| 18 | F | 57 | 0.19 | 13.063 | 13.492 | 3.3% | 97.656 | 97.652 | 99.254 | 99.992 | 96.124 | 99.999 |
| 19 | M | 72 | 0.19 | 15.014 | 11.611 | −22.7% | 87.181 | 87.159 | 77.332 | 100.000 | 99.992 | 99.955 |
| 20 | M | 80 | 0.24 | 46.828 | 54.497 | 16.4% | 92.426 | 92.374 | 99.990 | 99.894 | 85.933 | 100.000 |
| 21 | M | 74 | 0.22 | 56.517 | 59.147 | 4.7% | 97.526 | 97.503 | 99.793 | 99.956 | 95.365 | 99.998 |
| 22 | M | 91 | 0.1 | 482.939 | 429.534 | −11.1% | 94.147 | 93.675 | 88.942 | 100.000 | 100.000 | 99.056 |
|
| ||||||||||||
| Mean | 72.5 | 0.20 | −6.2% | 89.933 | 89.904 | 88.036 | 99.992 | 94.174 | 99.949 | |||
| STDEV | 10.4 | 0.04 | 22.3% | 6.460 | 6.446 | 12.117 | 0.024 | 8.886 | 0.200 | |||
Note: Demar.: the lowest intensity, above I peak, of the infarcts demarcated by the neurologist; SI: similarity index; Sen.: sensitivity; Spe.: specificity; PPV: positive predictive value; NPV: negative predictive value; STDEV: standard deviation; ΔVol. = (Semi-auto. vol. − Auto. vol.)/Semi-auto. vol.