Osteoid Osteoma with a Multicentric Nidus: Interstitial Laser Ablation under MRI Guidance
Figure 3
A fast dynamic T1w TSE sequence (image acquisition 2 s) was used for verifying proper needle/laser placement in the target lesion ((a) and (b)). Note the needle artifact with projection of the needle tip onto the nidus (solid arrowhead in (a)). Note the additional benefit of multiplanar navigation in a parasagittal plane (b). Both drilling holes can be seen in this parasagittal plane after the procedure (solid arrowheads in (c)). Subtraction images of unenhanced T1-w TSE and contrast-enhanced T1-w TSE were generated to confirm complete ablation by the absence of nidal contrast enhancement ((d) and dotted areas in (e)).
