For size (as in an enlarged heart), you can use XRays (which are cheaper) but, ultrasound is better for soft tissue.
High CPK along with a normal bile acids is usually heart problems BUT it can also go up from giving the bird injections, trauma or self mutilation because high CPK is, basically, caused by muscular degeneration/damage and injections are hell for birds soft tissue (and that's why I never allow vets to give my birds shots!) Ah, it also goes up with PDD for the same reason (the damage to the proventriculus which is made of muscle).
Oh, and I haven't forgotten about the pictures, Birdwoman, but my husband is back in Ct until Thursday and I have been super busy with these two feral kittens that I took in (there were three, one of them died but I managed to get the other two to pull through by feeding them in the mouth and giving them subQ fluids several times a day -they are so tiny, you can only do a little bit at a time) and my grand-daughter's guinea pigs (taken away because she was 'bad' so I am taking care of them temporarily although she has been told it's permanent -her parents will 'forgive' her and return them to her when she 'straightens out' her behavior) - this on top of my ten cats, my five dogs, my 30 + birds and the feral cat colony I care for!

- I just came back from dropping a cat for surgery at the vet and, now that the kittens are stronger (they went to the vet where they were checked, dewormed and tested for FeL, FIV and panleuko -all negative

) I am going to bathe them to get rid of the fleas and bomb my husband's den where they have been kept isolated from the other cats.