def is_hitachi(dicom_input):
    """
    Use this function to detect if a dicom series is a hitachi dataset

    :param dicom_input: directory with dicom files for 1 scan of a dicom_header
    """
    header = dicom_input[0]
    if 'Manufacturer' not in header or 'Modality' not in header:
        return False
    if header.Modality.upper() != 'MR':
        return False
    if 'HITACHI' not in header.Manufacturer.upper():
        return False
    return True
