I'm very sorry for your loss. :hugs
Glad they made everything clearer for you and you were able to help Jazz. Hopefully she can live a good long time now.
Chickens are very, very good at hiding illness, it's really easy to miss things until they are pretty advanced, so don't beat yourself...
The diagram makes everything look very spacious and neat and perfect, in reality everything is right next to everything else, there isn't really any extra space in there, so one thing is right next to another, which can make it harder to distinguish different parts in images. Some things show...
I'm not real good with ultrasound or xray images unless it's really obvious. :oops:
It sounds like you have a competent and experienced vet with birds (some people don't), so that's a very good thing. You will just need to weigh all the information and make a decision that's best for you...
I have heard of some getting the implant for internal laying, I think it's very much case by case, depending on the actual condition of the bird, how long it's been going on, etc. I will link to one thread below, you can search for more. I have also heard of some where surgery was done to...