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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _decompress_dicom(dicom_file, output_file):
 """ This function can be used to convert a jpeg compressed image to an uncompressed one for further conversion :param input_file: single dicom file to decompress """

    gdcmconv_executable = _get_gdcmconv()

    subprocess.check_output([gdcmconv_executable, '-w', dicom_file, output_file])