BBTK_OUTPUT(ImageProperties,Index,"Origin of the image",std::vector<int>,"image index");
BBTK_OUTPUT(ImageProperties,Size,"Size in each dimension",std::vector<int>,"image size");
BBTK_OUTPUT(ImageProperties,Spacing,"Size of the voxels",std::vector<float>,"voxel size");
BBTK_OUTPUT(ImageProperties,Index,"Origin of the image",std::vector<int>,"image index");
BBTK_OUTPUT(ImageProperties,Size,"Size in each dimension",std::vector<int>,"image size");
BBTK_OUTPUT(ImageProperties,Spacing,"Size of the voxels",std::vector<float>,"voxel size");