Someone asked me to try to describe what I saw in the x-ray, so I thought I'd answer it here.
Explain it...hmmm...
1st, our vet took about a million different angles of the knee up close.
Looking at the tissue around it, you could see a smoothness, kind of lines...the 'grain of the tissue' I guess you could say. It looked smooth and the tissue was all an even shade. Then in the area closest to the actual kneecap itself, there was a disruption in the smoothness...maybe the size of an eraser...that just looked 'fuzzy.' There was another maybe half the size beside it too. (Small, but only a 2 pound dog here) I really wished could have gotten a copy, but she kept them so she could compare later.
The dog...my parents small male...had stepped of one single stair wrong, fell, then got up limping. The vet classified it as grade 1...but later on after he'd 'recovered' said she couldn't really detect it unless she forced it.
I tried to search the net to see if I could find an example and couldn't, but I did come accross this really nice site with some great examples of LP.
http://www.marvistavet.com/html/medi...g_patella.html