Fig. 1From: Evaluation of MRI protocols for the assessment of lumbar facet joints after MR-guided focused ultrasound treatmentT2-weighted planning images are shown with the focal spot on the facet joint (left image). The beam orientation was chosen to best protect the spinal nerve roots, the spinal canal, and the spinal process as outlined in green. After HIFU treatment, the area of ablation is shown in blue (dose overlay) on the right imageBack to article page