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Updated: Sep 11, 2025
Whole-brain Segmentation and Change-point Analysis of Anatomical Brain MRI—Application in Premanifest Huntington's Disease
Published on: June 9, 2018
Bias in HD-ISS staging introduced by the FreeSurfer cross-sectional stream: Insights from the Huntington's Disease
Harry Knights1, Annabelle Coleman1, Mena Farag1
1Huntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Abstract:
Huntington's Disease Integrated Staging System (HD-ISS) stages are likely inclusion criteria in future clinical trials. Stage 1 volumetric cut-offs were derived using the FreeSurfer longitudinal stream (LG). However, trials will require cross-sectional stream (CS) application with one MRI. Volumetric outputs are not robust to software type or version. T1-weighted images from 88 participants with MRIs from baseline and follow-up HD-YAS visits were segmented using both streams. CS calculated smaller caudate and putamen volumes adjusted for total intracranial volume, with greater reduction for larger volumes, shifting towards HD-ISS stage 1. CS-specific cut-offs need to be established before application to clinical trials.
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