The goal of this study is to evaluate the comparative effectiveness of CT-guided and fluoroscopic-guided genicular nerve ablation in reducing knee pain and improving function in adults diagnosed with knee osteoarthritis refractory to conservative treatment. The main questions it aims to answer are: * Does CT-guided genicular nerve ablation provide superior pain relief compared to fluoroscopic-guided genicular nerve ablation? * Is there a significant difference in functional improvement between the two techniques? Researchers will compare the outcomes between the CT-guided and fluoroscopic-guided groups to determine which method achieves better pain relief, functional enhancement, safety profile, and patient satisfaction. Participants will: * Undergo either CT-guided or fluoroscopic-guided genicular nerve ablation. * Attend scheduled follow-up visits to assess pain levels, knee function, and any adverse events. * Complete standardized questionnaires to provide feedback on pain relief, functional improvement, and overall satisfaction with the procedure.