  In this work we propose a method for anatomical data augmentation that is
based on using slices of computed tomography (CT) examinations that are
adjacent to labeled slices as another resource of labeled data for training the
network. The extended labeled data is used to train a U-net network for a
pixel-wise classification into different hepatic lesions and normal liver
tissues. Our dataset contains CT examinations from 140 patients with 333 CT
images annotated by an expert radiologist. We tested our approach and compared
it to the conventional training process. Results indicate superiority of our
method. Using the anatomical data augmentation we achieved an improvement of 3%
in the success rate, 5% in the classification accuracy, and 4% in Dice.
