Query forum threads where LatestPostDate> some date?

Is there a way to find threads where the LatestPostDate is greater than a passed in datetime. Specifically, I'm looking for threads with replies since that  passed in datetime.

I know I can search Threads by CreatedDate, like below, but that doesn't help me as an older thread may have a recent reply.


Also, I know I can search for Replies with a particular created date, but I can only query those for a particular thread. I would have to run the query below for every thread.


I'm trying to avoid having to query all threads and compare its LastPostDate to what it previously was. 

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