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Fig. 3B MRI of distal femur performed after radiofrequency ablation in
30-year-old woman with osteoid osteoma. Axial STIR image at 1 day shows high
signal along drill hole (arrow). Heterogeneous high signal is seen in
marrow adjacent to probe placement tract deep in relation to high-signal
nidus. High signal is seen in soft tissues and periosteum superficial to drill
hole. No band of peripheral marrow signal change is seen.