Fig. 122 (abstract O86).

Example of CE-MR images obtained immediately following MR-HIFU treatment and follow-up CE-CT images. Lack of contrast uptake indicates the ablated regions (arrows). a Coronal image showing the continuous regions of ablation along the SIJs. b-c Axial CE-MR images of the most superior and inferior slices of the bilateral lesions. Axial CE-CT images showing a successful ablation confined to the SIJ and adjacent tissue (d), and unwanted necrosis of a large volume of muscle and skin (asterisk), which resulted from potentially insufficient cooling time between consecutive sonications (e)