From: Dynamic variations in the ultrasound greyscale median of carotid artery plaques
Plaque sample | Our method | Manual delineation | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
GSM | Area | GSM | Area | |||||||||
mean | s.d. | CV | mean (mm2) | s.d. (mm2) | CV | mean | s.d. | CV | mean (mm2) | s.d. (mm2) | CV | |
px2 | 32.3 | 2.80 | 8.7% | 27.9 | 1.12 | 4.0% | 28.7 | 3.88 | 13.5% | 27.5 | 2.10 | 7.6% |
px4 | 76.9 | 2.22 | 2.9% | 11.3 | 1.05 | 9.3% | 78.1 | 4.57 | 5.9% | 11.0 | 2.03 | 18.4% |
px11 | 70.2 | 1.27 | 1.8% | 38.0 | 0.23 | 0.61% | 73.0 | 3.36 | 4.6% | 37.4 | 0.40 | 1.1% |
px26 | 43.4 | 1.49 | 3.4% | 39.5 | 0.94 | 2.4% | 45.9 | 2.27 | 4.9% | 36.9 | 1.61 | 4.4% |
px21 | 52.4 | 2.35 | 4.5% | 22.7 | 1.09 | 4.8% | 51.3 | 2.86 | 5.6% | 22.1 | 1.80 | 8.1% |
px22 | 67.4 | 2.15 | 3.2% | 21.5 | 0.80 | 3.7% | 67.6 | 3.54 | 5.2% | 21.3 | 1.75 | 8.2% |
px12 | 54.0 | 3.72 | 6.9% | 14.9 | 0.39 | 2.6% | 52.9 | 4.47 | 8.5% | 15.0 | 1.23 | 8.2% |
px5 | 36.9 | 4.31 | 11.7% | 22.0 | 0.96 | 4.4% | 36.0 | 4.66 | 13.0% | 22.4 | 1.71 | 7.7% |
Column means | 54.2 | 2.54 | 5.4% | 24.7 | 0.82 | 4.0% | 54.2 | 3.70 | 7.7% | 24.2 | 1.58 | 8.0% |