Katharina Wittfeld

Oct 4, 2024 | nature.com | Junhao Wen |Ilya M. Nasrallah |Guray Erus |Jingxuan Bao |Andrew J. Saykin |Timothy J. Hohman | +11 more

AbstractAlzheimer’s disease (AD) is associated with heterogeneous atrophy patterns. We employed a semi-supervised representation learning technique known as Surreal-GAN, through which we identified two latent dimensional representations of brain atrophy in symptomatic mild cognitive impairment (MCI) and AD patients: the “diffuse-AD” (R1) dimension shows widespread brain atrophy, and the “MTL-AD” (R2) dimension displays focal medial temporal lobe (MTL) atrophy.

Aug 15, 2024 | nature.com | Zhijian Yang |Junhao Wen |Guray Erus |Elizabeth Mamourian |Katharina Wittfeld |Duygu Tosun | +17 more

AbstractBrain aging process is influenced by various lifestyle, environmental and genetic factors, as well as by age-related and often coexisting pathologies. Magnetic resonance imaging and artificial intelligence methods have been instrumental in understanding neuroanatomical changes that occur during aging.

Jan 10, 2024 | nature.com | Francesco Benedetti |Kathryn Cullen |Ian H. Gotlib |J Hamilton |Thomas Lancaster |Sara Poletti | +5 more

AbstractMachine learning (ML) techniques have gained popularity in the neuroimaging field due to their potential for classifying neuropsychiatric disorders. However, the diagnostic predictive power of the existing algorithms has been limited by small sample sizes, lack of representativeness, data leakage, and/or overfitting.

Apr 17, 2023 | nature.com | Marie-Gabrielle Duperron |Maria J. Knol |Quentin Le Grand |Tavia E. Evans |Ami Tsuchida |Gennady V Roshchupkin | +35 more

AbstractPerivascular space (PVS) burden is an emerging, poorly understood, magnetic resonance imaging marker of cerebral small vessel disease, a leading cause of stroke and dementia. Genome-wide association studies in up to 40,095 participants (18 population-based cohorts, 66.3 ± 8.6 yr, 96.9% European ancestry) revealed 24 genome-wide significant PVS risk loci, mainly in the white matter.