A good radiologist will note any abnormal findings in the field of the
scan.  But the scan takes cuts, and they will be based on the area of
interest (ie: urinary tract).  So there's no guarantee the scan would
pick up anything not in the area.
    But this is not the way to investigate a symptom.  First go to the doc
and tell him/her what you're feeling.  Try to flesh out a bit when and
how things feel not quite right.  The doc will then do the appropriate
test(s).

Good luck,
Steve