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The Compactness index is sensitive to the spherical vs. non-spherical shapes. Pre-contrast, post-contrast and subtraction images from two cases with relative low/high Compactness index are shown. The top row is one malignant lesion with compactness index 63, ranked #60 in all 71 lesions. The bottom row is one benign case with compactness index 1.7, ranked #22 in all 71 lesions.
