SQL FULLTEXT Search specific XML nodes within an XML column

Question

I would like to know if it's possible to do a Full-Text search on specific XML nodes within a cataloged XML column.

XML Sample:

<Items>
  <Item>
    <Field>first_name</Field>
    <Data>John</Data>
  </Item>
  <Item>
    <Field>last_name</Field>
    <Data>Doe</Data>
  </Item>
</Items>

I'm able to query by individual field using XPATH expressions similar to the following:

SELECT * FROM table  
WHERE xml_column.query('/Items/Item[Field="first_name"]').value('(/Item/Data)[1]','varchar(255)') like 'John'

However what I would like to accomplish is to be able to FREETEXT search individual XML nodes, for example only "first_name" fields. So something similar to the following statement only this does not work:

SELECT * FROM table  
WHERE (FREETEXT(xml_column.query('/Items/Item[Field="first_name"]').value('(/Item/Data)[1]','varchar(255)'), 'John'))