np.save(os.path.join(directory, patient + '_img_' + str(size) + '_nonvessel_' + str(current_nr_extracted_patches)), np.asarray(random_img_patch))
                        np.save(os.path.join(directory, patient + '_label_' + str(size) + '_nonvessel_' + str(current_nr_extracted_patches)), np.asarray(random_label_patch))