Hmmm
even looking at the rib cage - looks to be uneven unless you might have been standing off balance or turned a bit???
top ribs look uneven too

Is one shoulder higher than the other??
looks like it to me.

one side seems to have more muscle or bulk in the shoulder area or scar tissue?


It's hard to tell if all these are the normal for you or if it was due to the postures at the time of the x rays.

Maybe do an internet search for other xrays that are similar postures to compare?
here's some -
http://www.google.com/images?hl=en&b...=&oq=&gs_rfai=

http://www.google.com/images?hl=en&b...=&oq=&gs_rfai=
http://handbook.muh.ie/X-Rays/Spine_xrays.htm