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Academic Radiology, Vol 26, No 2, February 2019 RADIOMICS IN DIAGNOSING LUMINAL A CANCERS
APPENDIX. RADIOMIC FEATURES EXTRACTED FROM BREAST DYNAMIC CONTRAST-ENHANCED MAGNETIC RESONANCE IMAGES
Image Feature
Description
Size
Volume (mm3)
Volume of lesion
Effective greatest dimension (mm)
Greatest dimension of a sphere with the same volume as the lesion
Surface area (mm2)
Lesion surface area
Maximum linear size (mm)
Maximum distance between any two voxels in the lesion
Shape
Sphericity
Similarity of the lesion shape to a sphere
Irregularity
Deviation of the lesion surface from the surface of a sphere
Surface area-to-volume ratio (1/mm)
Ratio of surface area to volume
Morphology
Margin sharpness
Mean of the image gradient at the lesion margin
Variance of margin sharpness
Variance of the image gradient at the lesion margin
Variance of radial gradient histogram
Degree to which the enhancement structure extends in a radial
pattern originating from the center of the lesion
Enhancement texture
Angular second moment (energy)