Fig. 2From: Machine learning-based segmentation of ischemic penumbra by using diffusion tensor metrics in a rat modelStrategy of 2-level Classification and Validation. a The proposed 2-level strategy for voxel-wise classification to classify every voxel in the hemisphere into a tissue subtype (i.e., the IC, IP, or NT). b The validation methods include 5-fold cross validation in training phase and leave-one-out cross validation for the final predictionBack to article page