PMC4018695_01
RF Needles Inserted at ala of the Sacrum and Lateral to S1, S2 Foramen, Other Needles Were Placed Similarly.
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PMC4018695_01_aapm-01-191-g001.jpg
fig8498
Figure 1 shows needles being injected at L5 medial branch nerve and lateral branch of S1 and S2 nerves, another needle is targeted at 0.5 cm above to S1 lateral branch for bipolar technique.