Search Index to not include page Keywords

I've read in the Sitefinity documentation that by default the page content, Keywords and description are all included an Index when created.

 Is there a way that I can exclude the Keywords from being included in the index so only the page description and content is included.

We have some keywords on a high level page for use with search engines but it isn't directly written in the content (it's on sub pages) so when it is returned in search results then text summary lists the Keywords which I would rather it did not do.