Thoracic disc herniations can cause local thoracic spine pain, radiating pain around the chest (or abdomen if it is a lower disc) and paresthesias (pins and needles) with occasional bowel and bladder changes and difficulty with walking from imbalance. It is not common for a thoracic disc hernation to cause actual leg pain.
Medial branch radio-frequency ablation works for facet pain but not for disc pain or nerve compression. Of course, if some of the pain is facet induced, facet blocks will indicate how much pain is generated.
If you want to have more information regarding the symptoms caused by cord compression, nerve compression or discal pain, an epidural injection would be the diagnostic test of choice (see website).
There is a chance that the pain can diminish without surgery but after two years, that percentage is lower.
Unless there is obvious bony anatomy changes, a CT scan will probably not be helpful.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.