Not sure why you are going to electrolysis first, there is far too much encrustation to go with that first. A soak in fresh water is warranted for an amount of time, or since it looks like quite a bit of calcium, a muriatic acid bath...then fresh water.
Before all that work, I would suggest the xray...
I use the mobile vets, and they have the most powerful xray machines, because they take them to the field. Xray film is about $15/sheet...
I have also talked my way into a clinic here and there, that have the real time tables...not as powerful though, but you can scan real time...