content: from batchgenerators.utilities.file_and_folder_operations import *
  import shutil
  from nnunetv2.dataset_conversion.generate_dataset_json import generate_dataset_json
  from nnunetv2.paths import nnUNet_raw
  import SimpleITK as sitk
  
  
  if __name__ == '__main__':
      """
      
      """
      # extracted traiing.zip file is here
      base = '/home/isensee/Downloads/'
      target_dataset_id = 21
      target_dataset_name = f'Dataset{target_dataset_id:03.0f}_CTAAorta'
  
      maybe_mkdir_p(join(nnUNet_raw, target_dataset_name))
      imagesTr = join(nnUNet_raw, target_dataset_name, 'imagesTr')
      labelsTr = join(nnUNet_raw, target_dataset_name, 'labelsTr')
      maybe_mkdir_p(imagesTr)
      maybe_mkdir_p(labelsTr)
  
      cases = subfiles(join(base, 'images'), join=False, prefix='subject')
      for case in cases:
          outname = case.replace('_CTA.mha', '')
          im = sitk.ReadImage(join(base, 'images', case))
          sitk.WriteImage(im, join(imagesTr, outname + '_0000.nii.gz'))
  
          seg = sitk.ReadImage(join(base, 'masks', case.replace('_CTA.mha', '_label.mha')))
          sitk.WriteImage(seg, join(labelsTr, outname + '.nii.gz'))
  
      labels = {
              "background": 0,
              "Zone_0": 1,
              "Innominate": 2,
              "Zone_1": 3,
              "Left_Common_Carotid": 4,
              "Zone_2": 5,
              "Left_Subclavian_Artery": 6,
              "Zone_3": 7,
              "Zone_4": 8,
              "Zone_5": 9,
              "Zone_6": 10,
              "Celiac_Artery": 11,
              "Zone_7": 12,
              "SMA": 13,
              "Zone_8": 14,
              "Right_Renal_Artery": 15,
              "Left_Renal_Artery": 16,
              "Zone_9": 17,
              "Zone_10_R_(Right_Common_Iliac_Artery)": 18,
              "Zone_10_L_(Left_Common_Iliac_Artery)": 19,
              "Right_Internal_Iliac_Artery_Dice_Score": 20,
              "Left_Internal_Iliac_Artery_Dice_Score": 21,
              "Zone_11_R_(Right_External_Iliac_Artery)": 22,
              "Zone_11_L_(Left_External_Iliac_Artery)": 23
          }
  
  
      generate_dataset_json(
          join(nnUNet_raw, target_dataset_name),
          {0: 'CTA'},
          labels,
          len(cases),
          '.nii.gz',
          None,
          target_dataset_name,
          overwrite_image_reader_writer='NibabelIOWithReorient',
          reference='https://aortaseg24.grand-challenge.org/',
          license='see ref'
      )