Fig. 3From: Pulsed radiofrequency in the management of lumbar radicular pain: initial experienceA 55-year-old male blacksmith suffering persistent left S1 radiculopathy with minimal motor weakness and refusing surgery a, b are sagittal and axial MRI images showing the L5-S1 disc prolapse with caudal migration to the left, c antro-posterior view showing a PRF cannula inserted in the first sacral foramen for monopolar stimulation of S1Back to article page