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• W2952950295 abstract "Abstract Background Magnetic-resonance-guided focused ultrasound ablation of ventral intermediate nucleus of the thalamus is a new treatment for tremor disorders. Objectives We sought to evaluate the white matter integrity prior to and following focused ultrasound ablation and its correlation with clinical outcome. Methods 22 patients with essential tremor and 17 patients with Parkinson’s disease underwent tremor and quality-of-life assessments prior to and at one and six months following focused ultrasound ablation. All patients underwent MRI including T1, T2-FLAIR and diffusion weighted imaging before treatment and at one day, 7–10 days, 1–3 months, and 6 months or more following it. Diffusivity parameters were calculated and fiber tractography measures were extracted. Change in diffusivity parameters were assessed inside the ablated core, in the motor thalamus and throughout the dentato-rubro-thalamo-cortical tract. Results We found short-term changes in the motor thalamus and in the tract between the thalamus and regions within the dentato-rubro-thalamo-cortical tract. Long term damage was found in the ablated core and in the tract connecting the thalamus and red-nucleus. Inverse correlation was found between fractional anisotropy in the motor thalamus one day following ablation and tremor improvement in both patient groups, with lower values before treatment associated with better outcome (tremor relief) in essential tremor patients. Conclusions Short-and long-term changes in white matter integrity are present following focused ultrasound thalamotomy. Regions demonstrating long-term white matter changes may be responsible for the tremor relief seen in patients, implicating these regions in the disorder’s pathogenesis." @default.
• W2952950295 created "2019-06-27" @default.
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• W2952950295 date "2019-05-03" @default.
• W2952950295 modified "2023-09-23" @default.
• W2952950295 title "Structural integrity following focused ultrasound thalamotomy and its correlation with tremor relief" @default.
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• W2952950295 doi "https://doi.org/10.1101/620369" @default.
• W2952950295 hasPublicationYear "2019" @default.
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