Automatic rating of incomplete hippocampal inversions evaluated across multiple cohorts
<|reference_start|>Automatic rating of incomplete hippocampal inversions evaluated across multiple cohorts: Incomplete Hippocampal Inversion (IHI), sometimes called hippocampal malrotation, is an atypical anatomical pattern of the hippocampus found in about 20% of the general population. IHI can be visually assessed on coronal slices of T1 weighted MR images, using a composite score that combines four anatomical criteria. IHI has been associated with several brain disorders (epilepsy, schizophrenia). However, these studies were based on small samples. Furthermore, the factors (genetic or environmental) that contribute to the genesis of IHI are largely unknown. Large-scale studies are thus needed to further understand IHI and their potential relationships to neurological and psychiatric disorders. However, visual evaluation is long and tedious, justifying the need for an automatic method. In this paper, we propose, for the first time, to automatically rate IHI. We proceed by predicting four anatomical criteria, which are then summed up to form the IHI score, providing the advantage of an interpretable score. We provided an extensive experimental investigation of different machine learning methods and training strategies. We performed automatic rating using a variety of deep learning models (conv5-FC3, ResNet and SECNN) as well as a ridge regression. We studied the generalization of our models using different cohorts and performed multi-cohort learning. We relied on a large population of 2,008 participants from the IMAGEN study, 993 and 403 participants from the QTIM/QTAB studies as well as 985 subjects from the UKBiobank. We showed that deep learning models outperformed a ridge regression. We demonstrated that the performances of the conv5-FC3 network were at least as good as more complex networks while maintaining a low complexity and computation time. We showed that training on a single cohort may lack in variability while training on several cohorts improves generalization.<|reference_end|>
@article{hemforth2024automatic,
    title={Automatic rating of incomplete hippocampal inversions evaluated across
  multiple cohorts},
    author={Lisa Hemforth, Baptiste Couvy-Duchesne, Kevin De Matos, Camille
  Brianceau, Matthieu Joulot, Tobias Banaschewski, Arun L.W. Bokde, Sylvane
  Desrivi`eres, Herta Flor, Antoine Grigis, Hugh Garavan, Penny Gowland,
  Andreas Heinz, R"udiger Br"uhl, Jean-Luc Martinot, Marie-Laure Paill`ere
  Martinot, Eric Artiges, Dimitri Papadopoulos, Herve Lemaitre, Tomas Paus,
  Luise Poustka, Sarah Hohmann, Nathalie Holz, Juliane H. Fr"ohner, Michael N.
  Smolka, Nilakshi Vaidya, Henrik Walter, Robert Whelan, Gunter Schumann,
  Christian B"uchel, JB Poline, Bernd Itterman, Vincent Frouin, Alexandre
  Martin, IMAGEN study group, Claire Cury and Olivier Colliot},
    journal={Machine.Learning.for.Biomedical.Imaging. 2 (2024)},
    year={2024},
    doi={10.59275/j.melba.2024-3d4e},
    archivePrefix={arXiv},
    eprint={2408.02496},
    primaryClass={eess.IV cs.CV cs.LG q-bio.NC}
}