def _is_mt_on_philips(dicom_header):
    """Check whether a Philips header indicates that the sequence is MT/on."""
    if 'philips' not in dicom_header.Manufacturer.lower():
        raise ValueError('Not a Philips header')
    private_mt_value = dicom_header.get([0x2005, 0x10a0]).value
    return private_mt_value > 0.0