radiation CT scan question

lrr4993

I posted this in the radiation forum, but thought this forum may have more activity. 

I went in today for my planning session.  It involved a CT scan and the forming of a mold that I apparently will use with each treatment.  Here are my qusetions, if any of you know the answers: 

What parts of the body are scanned?  Seems like abdomen only.

Althought the purpose of the scan is not diagnositic, would it show any distant spread if it is there?  In other words, if I happen to have a tumor in my lung (knock on wood), would that be found by accident in reviewing this scan for radiation planning?  I am just wondering if I can use this scan as a interim pseudo-confirmation of lack of spread to those areas that are part of the scan.

I plan to ask my rad onco about it next week, but thought some of you may have some info on this.

Thanks!