FJ degeneration is responsible for up to 40% of Lower Back Pain (LBP). FJ degeneration is easily detectable using Computed Tomography (CT) or Magnetic Resonance Imaging (MRI). Although accurate CT/MRI guidance is definitely an expensive solution. Ultrasound guidance itself may be attractive, but it is too challenging because of a lack of detailed information in the vicinity of the bone. Nowadays, intra-articular injections and RFA are mainly performed using fluoroscopy or CT guidance. If real-time ultrasound were able to avoid the problem of spatial resolution it could be a promising technique due to the absence of radiation and  time and cost reductions. There is therefore a need to combine accuracy and high spatial resolution with a well-tolerated and inexpensive real-time technique. We report on preliminary experiences with ultrasound CT and ultrasound MRI fusion guidance using a multipurpose magnetic-tracking system. [1][2][3][4][5]