They are inconsistent for diagnosing CRPS. All they do is check for abnomalies in the bone itself. Mine showed arthritis already forming in my right knee and that the space in the right was really small. I got to see the images on a monitor above me. It also showed pooling around my left knee and ankle. I also had the emg/ncv and all my signs were crps. The Dr that did it even said I have crps and put it in his notes.