Evidence map›Paper›PMID 38263181›Full record

ArticleScientific data2024

Efficacy of MRI data harmonization in the age of machine learning: a multicenter study across 36 datasets.

Chiara Marzi, Marco Giannelli, Andrea Barucci, Carlo Tessa, Mario Mascalchi, Stefano Diciotti

Open access · goldAbstract read
In one paragraph

Article in Scientific data, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
18.5field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 55 citations in OpenAlex.

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  5. Advances in artificial intelligence for neuroimaging.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2026
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  19. Artificial Intelligence Is Brittle: We Need to Do Better.Radiology. Artificial intelligence · 2025
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 5 institutions in 2 countries.

Chiara MarziDepartment of Statistics, Computer Science and Applications "Giuseppe Parenti", University of Florence, 50134, Florence, Italy.ORCID 0000-0002-1791-3573
Marco GiannelliUnit of Medical Physics, Pisa University Hospital "Azienda Ospedaliero-Universitaria Pisana", 56126, Pisa, Italy.
Andrea Barucci"Nello Carrara" Institute of Applied Physics (IFAC), National Research Council (CNR), 50019, Sesto Fiorentino, Florence, Italy.ORCID 0000-0002-3759-7512
Carlo TessaRadiology Unit Apuane e Lunigiana, Azienda USL Toscana Nord Ovest, 54100, Massa, Italy.
Mario MascalchiDepartment of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, 50139, Florence, Italy.
Stefano DiciottiDepartment of Electrical, Electronic, and Information Engineering "Guglielmo Marconi" - DEI, University of Bologna, 47522, Cesena, Italy. stefano.diciotti@unibo.it.ORCID 0000-0001-8778-7819
Nello Carrara Institute of Applied Physics · ITAzienda Ospedaliera Universitaria Pisana · ITAzienda Usl Toscana Centro · ITLaboratori Guglielmo Marconi (Italy) · ITPrevention Institute · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Pooling publicly-available MRI data from multiple sites allows to assemble extensive groups of subjects, increase statistical power, and promote data reuse with machine learning techniques. The harmonization of multicenter data is necessary to reduce the confounding effect associated with non-biological sources of variability in the data. However, when applied to the entire dataset before machine learning, the harmonization leads to data leakage, because information outside the training set may affect model building, and potentially falsely overestimate performance. We propose a 1) measurement of the efficacy of data harmonization; 2) harmonizer transformer, i.e., an implementation of the ComBat harmonization allowing its encapsulation among the preprocessing steps of a machine learning pipeline, avoiding data leakage by design. We tested these tools using brain T

Indexed as

BrainMagnetic Resonance ImagingHealthy VolunteersHumansMachine LearningMulticenter Studies as Topic

Identifiers

PMID38263181
PMCPMC10805868
OpenAlexW4391124922

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.