[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-ai-model-turns-mri-scans-into-pet-like-brain-images":10,"sections":34},{"siteName":4,"siteTagline":5,"publisherName":4,"contactEmail":6},"The Revision","Tech news, decoded.","editor@therevision.news",{"gaMeasurementId":8,"adsenseClientId":9},"G-ZW2MV82GYR","ca-pub-8533917693782264",{"article":11},{"id":12,"slug":13,"title":14,"dek":15,"body_md":16,"tags_json":17,"published_at":18,"created_at":19,"updated_at":20,"status":21,"review_note":22,"review_notes":23,"image_url":22,"persona_id":22,"persona_name":22,"section":24,"tags":25,"sources":29,"feedback":33,"feedback_at":22,"cost_usd":33,"total_tokens":33},6891,"ai-model-turns-mri-scans-into-pet-like-brain-images","AI Model Turns MRI Scans Into PET-Like Brain Images","A new diffusion model maps MRI scans onto brain surface geometry to approximate FDG-PET dementia scans, nearing real PET's diagnostic accuracy in early tests.","A research team has built an AI system that generates synthetic PET brain scans from regular MRI data, a cheaper and radiation-free stand-in for a test that is central to dementia diagnosis.\n\nThe framework, called DB-SUiT, works directly on the folded surface of the cortex rather than treating the brain as a generic 3D volume, since that is where dementia-related metabolic changes actually show up. It pairs a spherical convolutional encoder with a transformer to model both local surface detail and long-range patterns across the brain, and it factors in a patient's demographics and subcortical structure to refine the output. Tested on two datasets covering different dementia types, the synthetic scans boosted automated diagnostic accuracy by 14.2% over using MRI alone and 11.3% over standard volume-based PET synthesis. In a blinded reading test, human readers hit 85.5% diagnostic accuracy on the synthetic scans, versus 75.8% for MRI and 95.2% for real PET.\n\nFDG-PET is one of the most reliable dementia biomarkers available, but it is expensive, involves radiation exposure, and is out of reach for many clinics, especially outside major hospital systems. A tool that approximates it from MRI, which is far more widely available, could extend earlier dementia screening to patients who would otherwise never get a PET scan. The model also held up on an external cohort that included a dementia subtype it had never seen during training, a meaningful test of whether this generalizes beyond a curated dataset.\n\nStill, a 10-point accuracy gap between synthetic and real PET is not nothing when the diagnosis is dementia, and this is a research paper with code on GitHub, not a cleared clinical tool.","[\"ai\",\"medical imaging\",\"dementia diagnosis\",\"diffusion models\"]","2026-09-18T04:00:00.000Z","2026-09-18T21:21:10.789Z","2026-09-18T21:21:22.707Z","published",null,[],"ai",[24,26,27,28],"medical imaging","dementia diagnosis","diffusion models",[30],{"name":31,"url":32},"arXiv cs.AI","https:\u002F\u002Farxiv.org\u002Fabs\u002F2609.20147",0,{"sections":35},[36,39,43,48,53,57,61,66,70,75,80,85,90,95],{"name":37,"slug":24,"count":38,"latest_published_at":18},"AI",4066,{"name":40,"slug":41,"count":42,"latest_published_at":18},"Security","security",657,{"name":44,"slug":45,"count":46,"latest_published_at":47},"Policy","policy",338,"2026-09-11T04:00:00.000Z",{"name":49,"slug":50,"count":51,"latest_published_at":52},"Deals","deals",179,"2026-06-29T20:02:07.000Z",{"name":54,"slug":55,"count":56,"latest_published_at":18},"Hardware","hardware",155,{"name":58,"slug":59,"count":60,"latest_published_at":18},"Science","science",123,{"name":62,"slug":63,"count":64,"latest_published_at":65},"Consumer Tech","consumer-tech",99,"2026-09-09T17:27:33.000Z",{"name":67,"slug":68,"count":69,"latest_published_at":18},"Dev Tools","dev-tools",78,{"name":71,"slug":72,"count":73,"latest_published_at":74},"Software","software",75,"2026-09-10T20:41:21.000Z",{"name":76,"slug":77,"count":78,"latest_published_at":79},"Startups","startups",55,"2026-09-09T23:14:29.000Z",{"name":81,"slug":82,"count":83,"latest_published_at":84},"Gaming","gaming",43,"2026-09-10T12:18:06.000Z",{"name":86,"slug":87,"count":88,"latest_published_at":89},"General","general",41,"2026-09-08T01:57:23.000Z",{"name":91,"slug":92,"count":93,"latest_published_at":94},"Reviews","reviews",20,"2026-06-24T12:00:01.000Z",{"name":96,"slug":97,"count":98,"latest_published_at":99},"How-To","how-to",6,"2026-06-16T09:00:00.000Z"]