{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"medRxiv"}],"indexed":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T20:07:12Z","timestamp":1787947632797,"version":"build-2784847793"},"posted":{"date-parts":[[2026,5,7]]},"group-title":"Neurology","reference-count":82,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T00:00:00Z","timestamp":1778112000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2026,5,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                <jats:p>Tau protein aggregation in the brain is a hallmark of Alzheimer\u2019s disease (AD). Positron emission tomography (PET) is the only in vivo method to visualize tau pathology and estimate both its burden and regional distribution, but the use of tau-PET is constrained by high cost and limited accessibility. Here, we develop a deep learning model to synthesize tau-PET scans from more accessible data: structural magnetic resonance imaging (MRI), demographics, and when available, blood biomarkers. We included 5,191 participants across the AD continuum or with another neurological disorder from 13 cohorts (mean age 70 years, 51% female) and optimized a 3D U-Net neural network with residual and attention units for this task. In held-out test data, synthetic tau-PET reliably modeled tau burden, with correlations of R=0.77\u20130.86 with true tau-PET across individuals in common AD regions of interest. Spatial similarity between synthetic and true tau-PET was likewise high, with mean regional correlation of R=0.75. Synthetic scans also captured clinically meaningful prognostic information comparable to true tau-PET, including distinction between early (HR=12, p&lt;0.001) and late (HR=45, p&lt;0.001) stages of tau accumulation. These findings demonstrate that clinically informative synthetic tau-PET scans can be generated from widely available modalities using deep learning, potentially offering a scalable and cost-effective approach for estimating tau AD pathology in the brain.<\/jats:p>","DOI":"10.64898\/2026.05.06.26352540","type":"posted-content","created":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T23:05:14Z","timestamp":1778195114000},"source":"Crossref","is-referenced-by-count":1,"title":["Generating synthetic tau-PET scans in Alzheimer\u2019s disease from MRI, blood biomarkers and demographics with deep learning"],"prefix":"10.64898","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0630-772X","authenticated-orcid":false,"given":"Linda","family":"Karlsson","sequence":"first","affiliation":[{"name":"Clinical Memory Research Unit, Department of Clinical Sciences in Malm\u00f6, Lund University, Lund, 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