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import os
import argparse
import SimpleITK as sitk


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Convert .mha image to .nii.gz format.")
    parser.add_argument("input_file", type=str, help="input .mha file")
    parser.add_argument("output_file", type=str, help="output .nii.gz file")
    args = parser.parse_args()

    image = sitk.ReadImage(args.input_file)
    sitk.WriteImage(image, args.output_file)