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Abstract #1820

Diffusion weighted imaging of the cerebello-thalamic pathway after MR guided high intensity focused ultrasound (HIFU) thalamotomy

José A. Pineda-Pardo1, Raul Martínez-Fernández2,3, Rafael Rodríguez-Rojas1, Marta Del-Alamo1, Frida Hernández1, Lydia Vela1, and José A. Obeso1

1Centro Integral de Neurociencias AC (CINAC), HM Puerta del Sur, Hospitales de Madrid, Móstoles, Spain, 2Centro Integral de Neurociencias AC (CINAC), HM Puerta del Sur, Hospitales de Madrid, Móstoles, 3CEU San Pablo University, Madrid, Spain

In here we aimed at characterizing the impact of the HIFU thalamotomy over the cerebello-thalamic pathway. We used probabilistic tractography to map the subject-specific anatomy of this pathway, we defined a set of regions along a group average pathway, and we extracted DTI based average values in these regions. We found local and distant alterations along the pathway 3-months post-treatment. These changes were strongly correlated with the clinical improvement of the patients. These findings serve to strengthen DWI, as a tool to aid in the targeting of HIFU in the treatment of essential tremor.

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