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Example SPGR image and feature maps: (A) SPGR image at middle time point (B) vessel-enhanced image (C) first PCA projection (D) area under curve (E) temporal standard deviation (F) SATID. These images demonstrate that voxels representing vessels (red circles) enhance on DCE-MRI and have high values on feature maps. SPGR, spoiled gradient-recalled; PCA, principal component analysis; SATID, summation of absolute temporal intensity difference.
