This section describes the features that can be calculated based on the existing relationships between several ROIs. So you need more than one ROI before you can calculate them. For example, the ROI intersection between 2 ROIs. These features use the whole image to obtain overall results (rather than ROI-by-ROI texture results).
These "whole body" features are grouped together under the COMPARE category.

 

COMPARE_RoiIntersection(IBSI:no)[vx]: Number of voxels common to roi0 and roi1 (roi1 intersection roi0, or roi0 intersection roi1)

COMPARE_Roi0ExcludesRoi1(IBSI:no)[vx]: Number of voxels of roi0 that are not in roi1

COMPARE_Roi1ExcludesRoi0(IBSI:no)[vx]: Number of voxels of roi1 that are not in roi0

 

COMPARE_RoiUnion(IBSI:no)[vx]: Number of voxels in roi1 union roi0

 

COMPARE_VolumeRatioRoi0vsRoi1(IBSI:no)[ratio]: Number of voxels in roi0 / number of voxel in roi1

COMPARE_VolumeRatioRoi1vsRoi0(IBSI:no)[ratio]: Number of voxels in roi1 / number of voxel in roi0

COMPARE_CommonDelineatedVolume(IBSI:no)[ratio]: Number of voxels common to roi0 and roi1 / number of voxel in roi0

COMPARE_AdditionalDelineatedVolume(IBSI:no)[ratio]: Number of voxels in roi1 that are not in roi0 / number of voxel in roi0

COMPARE_DiceSimilarityCoefficient(IBSI:no)[ratio]: Dice similarity coefficient

COMPARE_OverlapIndex_JaccardCoefficient(IBSI:no)[ratio]: Jaccard similarity coefficient

 

COMPARE_Max3DDiameterOfUnion(IBSI:no)[mm]: Maximal diameter of the roi1 union roi0

COMPARE_HausdorffDistance(IBSI:no)[mm]: Hausdorff distance between roi1 and roi0

COMPARE_MinimumDistanceBetweenSurfaceRoi0AndSurfaceRoi1(IBSI:no)[mm]: Minimum distance between surface of roi0 and surface of roi1

COMPARE_MinimumDistanceBetweenSurfaceRoi1AndCentroidRoi0(IBSI:no)[mm]: Minimum distance between surface of roi1 and centroid of roi0

COMPARE_MinimumDistanceBetweenSurfaceRoi0AndCentroidRoi1(IBSI:no)[mm]: Minimum distance between surface of roi0 and centroid of roi1