Results

Method details

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Carotid arteries segmentation in CT images with use of a right generalized cylinder model

Abstract:
The arterial lumen is modeled by a spatially continuous right generalized cylinder with piece-wise constant parameters. The method is the identifies the parameters of each cylinder piece from a series of planar contours extracted along an approximate axis of the artery. This curve is defined by a minimal path between the artery end-points. The contours are extracted by use of a 2D Fast Marching algorithm. The identification of the axial parameters is based on a geometrical analogy with piece-wise helical curves, while the identification of the surface parameters uses the Fourier series decomposition of the contours. Thus identified parameters are used as observations in a Kalman optimal estimation scheme that manages the spatial consistency from each piece to another. The method was was evaluated on 15 training and 31 testing datasets from the MICCAI 3D Segmentation in the Clinic Grand Challenge: Carotid Bifurcation Lumen Segmentation and Stenosis Grading

Summary lumen

Measure% / mmrank
 min.max.avg.min.max.avg.
dice 0.0% 92.4% 60.1% 5 5 4.51
msd 0.25mm 17.27mm 3.80mm 5 5 4.51
Hausdorff 1.70mm 20.00mm 13.84mm 5 5 4.51
Total (lumen)       5 5 4.51

Summary stenosis

Measure%rank
 min.max.avg.min.max.avg.
diam 0.0% 100.0% 53.8% 1 5 4.44
area 0.0% 100.0% 46.0% 1 5 4.37
diam* 0.0% 100.0% 36.2% -- -- --
area* 0.0% 100.0% 39.7% -- -- --
Total (stenosis)       1 5 4.40



Averages lumen

TeamTotaldicemsdHausdorffTotal
namesuccess%rankmmrankmmrankrank
ObserverA 41 95.1 2.6 0.10 2.7 0.65 2.7 2.7
ObserverB 41 94.6 3.2 0.11 3.2 0.83 2.9 3.1
ObserverC 41 94.4 3.2 0.12 3.1 0.97 3.4 3.2
Reference 41 100.0 1.0 0.01 1.0 0.06 1.0 1.0
RGC 37 53.6 4.9 3.39 4.9 12.35 4.9 4.9

Averages stenosis

TeamTotaldiamareaBaselineTotal
namesuccess%rank%rankdiam*area*lumensrank
ObserverA 41 3.4 2.2 2.9 2.0 6.7 8.2 41 2.1
ObserverB 41 5.4 2.4 4.3 2.3 9.0 8.7 41 2.3
ObserverC 41 5.7 2.6 5.0 2.8 11.2 10.3 41 2.7
Reference 41 0.0 1.0 0.0 1.0 6.6 8.0 41 1.0
RGC 41 43.3 4.4 37.0 4.4 36.2 39.7 33 4.4





* The measures indicated with an asterix (*) or in italics are not determined by the participants, but are the result of applying a standardized algorithm by the framework. These measures are not used in the calculation of the ranks.

Your results compared to the observers

DatasetTeamdicemsdHausdorff
nr.name%rankmmrankmmrank
009 RGC 0.0 5 10.04 5 20.00 5
009 ObserverA 95.1 4 0.09 4 0.58 2
009 ObserverB 95.2 3 0.09 3 0.61 3
009 ObserverC 95.5 2 0.08 2 1.11 4
009 Reference 100.0 1 0.01 1 0.05 1
010 RGC 84.7 5 0.44 5 5.62 5
010 ObserverA 96.2 2 0.09 2 0.42 2
010 ObserverB 95.7 3 0.10 3 0.53 3
010 ObserverC 95.4 4 0.11 4 1.68 4
010 Reference 100.0 1 0.01 1 0.04 1
011 RGC 81.6 5 0.53 5 7.29 5
011 ObserverA 96.3 2 0.06 2 0.42 3
011 ObserverB 95.4 4 0.08 3 0.36 2
011 ObserverC 95.4 3 0.09 4 0.43 4
011 Reference 100.0 1 0.01 1 0.07 1
012 RGC F 5 F 5 F 5
012 ObserverA 95.4 3 0.15 3 0.76 3
012 ObserverB 95.6 2 0.14 2 0.77 4
012 ObserverC 93.6 4 0.21 4 0.69 2
012 Reference 100.0 1 0.01 1 0.07 1
013 RGC 73.2 5 1.15 5 15.00 5
013 ObserverA 95.6 2 0.08 2 0.64 3
013 ObserverB 95.2 3 0.09 3 0.55 2
013 ObserverC 95.1 4 0.09 4 0.78 4
013 Reference 100.0 1 0.01 1 0.05 1
014 RGC 92.0 5 0.41 5 14.56 5
014 ObserverA 97.1 2 0.08 2 0.62 4
014 ObserverB 96.5 4 0.10 4 0.46 3
014 ObserverC 96.9 3 0.09 3 0.38 2
014 Reference 100.0 1 0.01 1 0.06 1
015 RGC 0.0 5 14.70 5 20.00 5
015 ObserverA 95.3 4 0.09 4 0.50 2
015 ObserverB 95.4 3 0.08 3 0.61 3
015 ObserverC 95.5 2 0.08 2 0.72 4
015 Reference 100.0 1 0.01 1 0.06 1
016 RGC 87.9 5 0.71 5 15.00 5
016 ObserverA 95.3 2 0.09 2 0.94 4
016 ObserverB 94.8 4 0.10 4 0.75 3
016 ObserverC 95.1 3 0.10 3 0.70 2
016 Reference 100.0 1 0.01 1 0.06 1
017 RGC 78.9 5 1.12 5 15.00 5
017 ObserverA 95.2 2 0.09 2 0.77 2
017 ObserverB 94.6 4 0.10 4 0.97 3
017 ObserverC 94.7 3 0.10 3 1.30 4
017 Reference 100.0 1 0.01 1 0.06 1
018 RGC 15.9 5 4.91 5 15.66 5
018 ObserverA 96.4 2 0.09 2 0.78 2
018 ObserverB 95.9 3 0.10 3 0.82 3
018 ObserverC 95.6 4 0.11 4 0.99 4
018 Reference 100.0 1 0.01 1 0.05 1
019 RGC 37.7 5 3.50 5 15.00 5
019 ObserverA 96.2 4 0.08 4 0.42 3
019 ObserverB 96.3 3 0.08 3 0.46 4
019 ObserverC 96.9 2 0.06 2 0.38 2
019 Reference 100.0 1 0.00 1 0.08 1
020 RGC 0.6 5 11.02 5 20.00 5
020 ObserverA 96.0 4 0.09 4 0.51 4
020 ObserverB 96.3 3 0.08 3 0.41 2
020 ObserverC 96.9 2 0.06 2 0.44 3
020 Reference 100.0 1 0.01 1 0.06 1
021 RGC 24.0 5 3.24 5 13.41 5
021 ObserverA 96.9 2 0.08 2 0.78 4
021 ObserverB 96.2 4 0.10 4 0.52 2
021 ObserverC 96.6 3 0.08 3 0.73 3
021 Reference 100.0 1 0.01 1 0.04 1
022 RGC 25.9 5 6.51 5 15.00 5
022 ObserverA 95.9 3 0.08 3 1.18 4
022 ObserverB 95.1 4 0.10 4 0.89 3
022 ObserverC 96.4 2 0.07 2 0.63 2
022 Reference 100.0 1 0.01 1 0.05 1
023 RGC F 5 F 5 F 5
023 ObserverA 96.4 4 0.08 4 0.42 4
023 ObserverB 96.6 2 0.07 2 0.32 2
023 ObserverC 96.6 3 0.08 3 0.41 3
023 Reference 100.0 1 0.01 1 0.06 1
024 RGC 43.0 5 2.03 5 8.50 5
024 ObserverA 95.4 2 0.09 2 0.76 3
024 ObserverB 94.2 4 0.12 4 0.63 2
024 ObserverC 94.5 3 0.11 3 1.36 4
024 Reference 100.0 1 0.01 1 0.08 1
025 RGC 20.4 5 4.53 5 15.00 5
025 ObserverA 96.3 2 0.06 2 0.29 2
025 ObserverB 95.2 4 0.08 4 0.35 3
025 ObserverC 95.5 3 0.08 3 1.43 4
025 Reference 100.0 1 0.01 1 0.07 1
026 RGC 88.1 5 0.36 5 6.66 5
026 ObserverA 96.0 3 0.08 3 0.48 3
026 ObserverB 96.3 2 0.07 2 0.46 2
026 ObserverC 95.7 4 0.09 4 1.17 4
026 Reference 100.0 1 0.01 1 0.05 1
027 RGC 92.4 5 0.36 5 10.93 5
027 ObserverA 96.5 2 0.05 2 0.33 3
027 ObserverB 96.1 4 0.06 4 0.40 4
027 ObserverC 96.4 3 0.06 3 0.27 2
027 Reference 100.0 1 0.01 1 0.05 1
028 RGC 0.0 5 14.91 5 20.00 5
028 ObserverA 96.2 2 0.08 2 0.67 4
028 ObserverB 95.8 4 0.09 4 0.49 2
028 ObserverC 96.1 3 0.08 3 0.61 3
028 Reference 100.0 1 0.01 1 0.08 1
029 RGC 59.3 5 2.99 5 19.01 5
029 ObserverA 96.1 2 0.08 2 0.91 2
029 ObserverB 95.2 4 0.10 4 0.92 3
029 ObserverC 95.6 3 0.09 3 1.11 4
029 Reference 100.0 1 0.01 1 0.05 1
030 RGC 69.6 5 1.12 5 7.53 5
030 ObserverA 95.2 4 0.08 4 0.42 3
030 ObserverB 95.5 2 0.08 2 0.35 2
030 ObserverC 95.5 3 0.08 3 0.55 4
030 Reference 100.0 1 0.01 1 0.04 1
031 RGC 0.0 5 17.27 5 20.00 5
031 ObserverA 96.2 4 0.08 4 0.59 3
031 ObserverB 96.4 3 0.08 3 0.49 2
031 ObserverC 96.5 2 0.07 2 1.15 4
031 Reference 100.0 1 0.00 1 0.04 1
032 RGC F 5 F 5 F 5
032 ObserverA 95.0 4 0.09 4 0.74 3
032 ObserverB 95.4 2 0.08 2 0.49 2
032 ObserverC 95.1 3 0.09 3 1.79 4
032 Reference 100.0 1 0.01 1 0.05 1
033 RGC 90.5 5 0.25 5 5.45 5
033 ObserverA 96.0 4 0.06 4 0.28 2
033 ObserverB 96.3 2 0.05 2 0.29 3
033 ObserverC 96.1 3 0.06 3 0.37 4
033 Reference 100.0 1 0.01 1 0.05 1
034 RGC 66.8 5 1.50 5 8.44 5
034 ObserverA 96.3 2 0.06 3 0.26 2
034 ObserverB 96.1 4 0.07 4 0.33 3
034 ObserverC 96.3 3 0.06 2 0.45 4
034 Reference 100.0 1 0.01 1 0.05 1
035 RGC 85.4 5 0.80 5 15.00 5
035 ObserverA 95.6 2 0.08 2 0.44 4
035 ObserverB 95.5 3 0.08 3 0.35 2
035 ObserverC 95.3 4 0.08 4 0.44 3
035 Reference 100.0 1 0.01 1 0.05 1
103 RGC 70.2 5 0.66 5 2.84 5
103 ObserverA 93.5 3 0.14 3 0.64 3
103 ObserverB 93.6 2 0.13 2 0.62 2
103 ObserverC 90.6 4 0.21 4 1.70 4
103 Reference 100.0 1 0.01 1 0.08 1
104 RGC 78.8 5 0.52 5 1.70 5
104 ObserverA 94.1 2 0.13 2 0.85 2
104 ObserverB 92.4 4 0.17 4 0.90 3
104 ObserverC 92.5 3 0.15 3 0.93 4
104 Reference 100.0 1 0.01 1 0.08 1
105 RGC 54.6 5 1.88 5 12.53 5
105 ObserverA 94.3 2 0.12 2 0.77 3
105 ObserverB 92.1 4 0.18 4 0.76 2
105 ObserverC 92.4 3 0.17 3 0.81 4
105 Reference 100.0 1 0.01 1 0.06 1
106 RGC 67.3 5 0.82 5 5.46 5
106 ObserverA 93.3 2 0.13 2 0.76 2
106 ObserverB 91.7 3 0.17 3 0.89 3
106 ObserverC 89.9 4 0.21 4 2.37 4
106 Reference 100.0 1 0.01 1 0.11 1
107 RGC 55.5 5 1.13 5 9.78 5
107 ObserverA 93.0 2 0.16 2 0.86 2
107 ObserverB 90.7 3 0.21 3 1.79 4
107 ObserverC 89.5 4 0.24 4 1.05 3
107 Reference 100.0 1 0.01 1 0.06 1
108 RGC 67.7 5 0.59 5 3.79 5
108 ObserverA 91.6 2 0.13 2 0.76 2
108 ObserverB 89.5 3 0.16 3 0.88 3
108 ObserverC 87.4 4 0.20 4 2.20 4
108 Reference 100.0 1 0.02 1 0.10 1
109 RGC 76.8 5 0.60 5 3.06 5
109 ObserverA 93.6 2 0.16 2 0.72 2
109 ObserverB 91.8 3 0.22 3 1.21 3
109 ObserverC 91.5 4 0.22 4 1.27 4
109 Reference 100.0 1 0.01 1 0.05 1
203 RGC 78.3 5 1.23 5 15.73 5
203 ObserverA 95.4 2 0.08 3 0.40 2
203 ObserverB 95.3 3 0.08 2 0.42 3
203 ObserverC 95.0 4 0.09 4 1.73 4
203 Reference 100.0 1 0.01 1 0.05 1
204 RGC 24.6 5 3.93 5 20.00 5
204 ObserverA 95.3 2 0.12 2 0.62 2
204 ObserverB 94.3 3 0.15 4 0.79 4
204 ObserverC 94.3 4 0.15 3 0.69 3
204 Reference 100.0 1 0.01 1 0.07 1
205 RGC 48.3 5 2.24 5 16.36 5
205 ObserverA 95.7 2 0.11 2 0.68 2
205 ObserverB 95.1 4 0.13 4 1.23 4
205 ObserverC 95.2 3 0.13 3 0.76 3
205 Reference 100.0 1 0.01 1 0.05 1
206 RGC 89.3 5 0.32 5 4.61 5
206 ObserverA 95.5 2 0.11 3 0.71 3
206 ObserverB 95.0 4 0.13 4 2.17 4
206 ObserverC 95.4 3 0.11 2 0.53 2
206 Reference 100.0 1 0.01 1 0.08 1
207 RGC 31.1 5 2.85 5 17.93 5
207 ObserverA 92.0 2 0.17 2 1.16 2
207 ObserverB 91.1 3 0.20 4 1.83 4
207 ObserverC 91.0 4 0.19 3 1.35 3
207 Reference 100.0 1 0.01 1 0.05 1
208 RGC F 5 F 5 F 5
208 ObserverA 90.3 3 0.20 3 0.77 2
208 ObserverB 90.1 4 0.20 4 2.57 4
208 ObserverC 91.0 2 0.17 2 1.25 3
208 Reference 100.0 1 0.01 1 0.08 1
209 RGC 22.2 5 4.30 5 15.00 5
209 ObserverA 92.5 3 0.19 3 0.86 2
209 ObserverB 93.3 2 0.17 2 3.25 4
209 ObserverC 91.8 4 0.21 4 1.02 3
209 Reference 100.0 1 0.01 1 0.09 1