Subthalamic Nucleus Location: Relationships between Stereotactic AC-PC-Based Diagrams and MRI Anatomy-Based Contours

François Caire (1, 2) , Lemlih Ouchchane (2, 3) , Jerome Coste (2, 4) , Jean Gabrillargues (2, 5) , Philippe Derost (6) , Miguel Ulla (6) , Franck Durif (6) , Jean-Jacques Lemaire (2, 4)

1 Service de Neurochirurgie [CHU Limoges]
2 ERIM-ERI 14 - Equipe de Recherche en Signal et Imagerie Medicale
3 Service de bio-statistiques
4 Service de Neurochirurgie [CHU Clermont-Ferrand]
5 Service de Radiologie A
6 Service de Neurologie [CHU Clermont-Ferrand]

Subthalamic nucleus (STN) targeting is classically performed based on AC-PC probabilistic position. Nevertheless, MRI allows direct visualization and targeting. We aimed to compare the position localized on MR images with standard stereotactic diagrams. The STN was manually contoured on MR images (22 Parkinson's disease patients); boundaries were simplified in a schematic polygonal form. Front and lateral stereotactic diagrams were constructed according to Talairach and Benabid. We compared x, y and z coordinates of the geometrical center of MRI-based polygons and stereotactic diagrams (Wilcoxon matched-pairs tests). There was significant discordance between MRI-based polygons and AC-PCbased images. MRI shows the STN as more posterior, medial and slightly inferior.

Mots clés: Subthalamic nucleus targeting; Deep brain stimulation; Stereotactic AC-PC-based diagrams

Domaines: Neurobiologie; Traitement du signal et de l'image [eess.SP]

François Caire, Lemlih Ouchchane, Jerome Coste, Jean Gabrillargues, Philippe Derost, et al.. Subthalamic Nucleus Location: Relationships between Stereotactic AC-PC-Based Diagrams and MRI Anatomy-Based Contours. Stereotactic and Functional Neurosurgery, 2009, 87, pp.337 - 347. ⟨10.1159/000236367⟩. ⟨hal-01552987⟩