# regmask_in_list: list of registration mask files (inside lungs)
# regmask_out_list: list of registration mask files (outised lungs)
# reg_in_list: list of registration image files (inside lungs)
# regmask_in_list: list of registration mask files (inside lungs)
# regmask_out_list: list of registration mask files (outised lungs)
# reg_in_list: list of registration image files (inside lungs)