def extract_dicommetadata(self, token, item_id):
parameters = dict()<EOL>parameters['<STR_LIT>'] = token<EOL>parameters['<STR_LIT>'] = item_id<EOL>response = self.request('<STR_LIT>', parameters)<EOL>return response<EOL>
Extract DICOM metadata from the given item

:param token: A valid token for the user in question.
:type token: string
:param item_id: id of the item to be extracted
:type item_id: int | long
:return: the item revision DAO
:rtype: dict