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List of features extracted from the nodule output mask. Features labeled with the asterisk were not used in the classification stage.
| Geometrical features | Intensity-related features |
|---|---|
| Center of gravity Xi=x,y,z (*) | Average |
| Radius (mm) | Average outside mask |
| Sphericity | Standard deviation |
| Skewness of distance from Xi | Standard deviation outside mask |
| Kurtosis of distance from Xi | Maximum |
| Volume (mm3) (*) | Entropy |
| Fraction of voxel connected to lung cage | Entropy outside mask |
