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Fig. 2A MR images, gross specimen, and photomicrograph of
radiofrequency-induced ablation zone day 4 after radiofrequency ablation in
distal femur of dog. Sagittal spin-echo T1-weighted image shows multilayered
lesion composed of central hyperintense area (arrowheads) surrounded
by dark hypointense band (small arrow), slightly hyperintense zone,
and subtle hypointense rim (large arrow).