Relaxation maps and segmentation map of volunteer 1.

Both T1 and T2 relaxations maps show homogeneous time values within the area of each tissue: prostate, muscle, fat, bladder and bone marrow. In the T1 and T2 maps, fat and bone marrow are not visually separable. The same happens in the T2 map for prostate and fat, muscle and bladder. However, the SVM classifier accuracy is rather excellent for prostate = 99.6%, fat = 92.5%, muscle = 99.3%, and bone marrow = 96.7%. Accuracy is lower for bladder (10.4%) and air (45%) mostly because of the small size of these regions.