*Result*: Leveraging Longitudinal Data to Improve BrainChart Calibration for Small Study Sample Sizes.

Title:
Leveraging Longitudinal Data to Improve BrainChart Calibration for Small Study Sample Sizes.
Authors:
Adamson C; National Centre for Healthy Ageing, Frankston, Victoria, Australia.; Peninsula Clinical School, Central Clinical School, Monash University, Frankston, Victoria, Australia.; Developmental Imaging Group, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia., Moran C; National Centre for Healthy Ageing, Frankston, Victoria, Australia.; School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.; Department of Home, Acute and Community, Alfred Health, Caulfield, Victoria, Australia., Brown A; Diabetes Research Group, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia., Collyer TA; National Centre for Healthy Ageing, Frankston, Victoria, Australia.; Peninsula Clinical School, Central Clinical School, Monash University, Frankston, Victoria, Australia., Sakowski SA; Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA., Srikanth V; National Centre for Healthy Ageing, Frankston, Victoria, Australia.; Peninsula Clinical School, Central Clinical School, Monash University, Frankston, Victoria, Australia.; Department of Geriatric Medicine, Peninsula Health, Mornington, Victoria, Australia., Northam EA; Diabetes Research Group, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia.; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.; Department of Endocrinology and Diabetes, Royal Children's Hospital, Parkville, Victoria, Australia., Feldman EL; Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA., Cameron FJ; Diabetes Research Group, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia.; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.; Department of Endocrinology and Diabetes, Royal Children's Hospital, Parkville, Victoria, Australia., Beare R; National Centre for Healthy Ageing, Frankston, Victoria, Australia.; Peninsula Clinical School, Central Clinical School, Monash University, Frankston, Victoria, Australia.; Developmental Imaging Group, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia.
Source:
Human brain mapping [Hum Brain Mapp] 2026 Feb 15; Vol. 47 (3), pp. e70476.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Wiley Country of Publication: United States NLM ID: 9419065 Publication Model: Print Cited Medium: Internet ISSN: 1097-0193 (Electronic) Linking ISSN: 10659471 NLM ISO Abbreviation: Hum Brain Mapp Subsets: MEDLINE
Imprint Name(s):
Publication: New York : Wiley
Original Publication: New York : Wiley-Liss, c1993-
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Grant Information:
R01 DK129320 United States NH NIH HHS
Contributed Indexing:
Keywords: BrainChart; FreeSurfer; MR imaging; brain structure; calibration; longitudinal studies; neuroimaging
Entry Date(s):
Date Created: 20260218 Date Completed: 20260218 Latest Revision: 20260221
Update Code:
20260221
PubMed Central ID:
PMC12914350
DOI:
10.1002/hbm.70476
PMID:
41705288
Database:
MEDLINE

*Further Information*

*Longitudinal brain imaging studies offer valuable insight into trajectories of brain structures over time; however, changes in acquisition scanners and protocols can introduce biases in the resulting measures. Although BrainChart provides a framework for calibrating FreeSurfer-derived brain structure measurements between studies or time points, population samples with small subject numbers ≤ 100 are known to give unstable sample effect parameter estimates. Under the assumption that centiles of control subjects are stable across time points, we present a method to improve reliability of population sample effect parameter estimation for time points in longitudinal studies that have small numbers of control participants but include a nested sample with repeat scans of some control participants at multiple time points. We verify the accuracy of this method using both simulated and real datasets, which demonstrate comparable estimates close to the ground truth and improved confidence intervals at smaller sample sizes than the original method. Additionally, our approach confirms accuracy across both time points and scanners. The software, which is available on GitHub, offers a means to extend the value of brain imaging data acquired using variable scanners and/or protocols for longitudinal studies, thus maximizing the value of brain imaging data in established cohorts.
(© 2026 The Author(s). Human Brain Mapping published by Wiley Periodicals LLC.)*