Hope this picture helps identify where the thoracic part of the spine is.

Is the pain in the center of your back, the spine? My pain is all in the side of my back, the whole right side starting from just under the shoulder blade to below my ribcage. This also wraps around to the front. There are times I've wondered is it something abdominal radiating up and around to the back OR is it stemming from my back and radiating to the front. CT scans, a thoracic MRI, ultrasounds, and xrays all show nothing wrong anywhere. If I take my left hand and wrap it around under my armpit to my back and press, I can feel the pain more. There are other times that I am 100% certain it's coming from an organ because it's just that kind of pain. But no tests have shown a thing even during the pain. The pain can come and go at the drop of a hat all day long or be steady for hours on end. I can have it for days, weeks or I can go months and months with nothing. It's been bad enough and scary enough to go to the ER, I don't do hospitals. They can't find a thing and I get that look. LOL. It's been a lot of years and I still don't know what it is. Five doctors have told me different things and they all disagree with each other. Thoracic pain outlet, vagus nerve, adhesions from gallbladder surgery, musculoskeletal issues, and costochondritis. It is what they consider chronic pain now but no other answers or help. It's now affecting my life in that I'm afraid to make plans because I never know when this is going to strike. I can put up with a lot but sometimes it's really bad. I don't know if I should try a pain managment dr, a neurologist, or some other field. I don't like meds so that's probably out unless it's a last resort.