ArticleHippocampus2025
Developing an Anatomically Valid Segmentation Protocol for Anterior Regions of the Medial Temporal Lobe for Neurodegenerative Diseases.
Article in Hippocampus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Rostral associations of MRI atrophy of the amygdala and entorhinal cortex across the AD spectrum.Neuroimage. Reports · 2026Article
- Vulnerability of anterior medial temporal lobe subregions to early tau-related neurodegeneration in Alzheimer's disease: Converging evidence from tau-PET and plasma p-tau217.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Medial temporal lobe Tau-Neurodegeneration mismatch from structural imaging and plasma biomarkers.Brain : a journal of neurology · 2026Article
- Rostral Associations of MRI Atrophy of the Amygdala and Entorhinal Cortex Across the AD Spectrum.medRxiv : the preprint server for health sciences · 2026Article
- Enrichment of patients with concomitant limbic-predominant age-related TDP-43 encephalopathy (LATE) on the Alzheimer's disease continuum using hippocampal volume.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025Article
- Developing an Anatomically Valid Segmentation Protocol for Anterior Regions of the Medial Temporal Lobe for Neurodegenerative Diseases.Hippocampus · 2025Article
- Tau-Clinical Mismatch Identifies Individuals with Co-Pathology and Predicts Clinical Trajectory.medRxiv : the preprint server for health sciences · 2025Article
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Abstract
The anterior portion of the medial temporal lobe (MTL) is one of the first regions targeted by pathology in sporadic Alzheimer's disease (AD) and limbic-predominant age-related TDP-43 encephalopathy (LATE) indicating a potential for metrics from this region to serve as imaging biomarkers. Leveraging a unique post-mortem dataset of histology and magnetic resonance imaging (MRI) scans, we aimed to (1) develop an anatomically valid segmentation protocol for anterior entorhinal cortex (ERC), Brodmann area (BA) 35, and BA36 for in vivo 3 T MRI and (2) incorporate this protocol in an automated approach. We included 20 cases (61-97 years old, 50% females) with and without neurodegenerative diseases (11 vs. 9 cases) to ensure generalizability of the developed protocol. Digitized MTL Nissl-stained coronal histology sections from these cases were annotated and registered to same-subject post-mortem MRI. The protocol was developed by determining the location of histological borders of the MTL cortices in relation to anatomical landmarks. Subsequently, the protocol was applied to 15 cases twice, with a 2-week interval, to assess intra-rater reliability with the Dice Similarity Index (DSI). Thereafter, it was implemented in our in-house Automatic Segmentation of Hippocampal Subfields (ASHS)-T1 approach and evaluated with DSIs. The anterior histological border distances of ERC, BA35 and BA36 were evaluated with respect to various anatomical landmarks, and the distance relative to the beginning of the hippocampus was chosen. To formulate segmentation rules, we examined the histological sections for the location of borders in relationship to anatomical landmarks in the coronal sections. The DSI for the anterior MTL cortices for the intra-rater reliability was 0.85-0.88, and for the ASHS-T1 against the manual segmentation, it was 0.62-0.65. We developed a reliable segmentation protocol and incorporated it in an automated approach. Given the vulnerability of the anterior MTL cortices to tau deposition in AD and LATE, the updated approach is expected to improve imaging biomarkers for these diseases.
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