Ultrasound guidance for transforaminal percutaneous endoscopic lumbar discectomy may prevent radiation exposure: A case report

Figure 1 X-ray and computed tomography transverse images of the patient. A and B: X-ray images showing small curvature of the lumbar spine; C: Computed tomography (CT) image suggesting L3-4 disc herniation (black arrow, left margin type); D: CT image suggesting L4-5 disc herniation (black arrow, left margin type).