{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"medRxiv"}],"indexed":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T23:58:53Z","timestamp":1781049533519,"version":"3.54.1"},"posted":{"date-parts":[[2026,6,6]]},"group-title":"Radiology and Imaging","reference-count":32,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T00:00:00Z","timestamp":1780704000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Veterans Affairs Palo Alto Healthcare System"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2026,6,6]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                <jats:sec>\n                  <jats:title>PURPOSE<\/jats:title>\n                  <jats:p>Alzheimer\u2019s disease (AD) is associated with cognitive impairment, brain atrophy, and elevated amyloid-beta (A\u00df) and tau. The study aimed to characterize regional atrophy associated with elevated A\u00df and tau, as measured by [\u00b9 F]florbetapir (FBP) and [\u00b9 F]flortaucipir (FTP) positron emission tomography (PET), respectively, and determine whether combining PET and atrophy data improves the prediction of cognitive impairment.<\/jats:p>\n                <\/jats:sec>\n                <jats:sec>\n                  <jats:title>METHODS<\/jats:title>\n                  <jats:p>Alzheimer\u2019s Disease Neuroimaging Initiative data (n = 381) were retrospectively analyzed. PET results were correlated with cortical thickness, gray matter (GM) volumes, Mini-Mental State Examination, and Montreal Cognitive Assessment. Linear\/logistic regression and area under the curve (AUC) were used to evaluate for significant correlations and compare performances in distinguishing cognitive impairment, respectively.<\/jats:p>\n                <\/jats:sec>\n                <jats:sec>\n                  <jats:title>RESULTS<\/jats:title>\n                  <jats:p>Incremental loss of cortical thickness and GM volume was observed from FBP-\/FTP-(n = 205) to single PET-positive (FBP+\/FTP-, n = 133; FBP-\/FTP+, n = 5) and FBP+\/FTP+ (n = 38) groups, particularly in the temporal and parietal lobes. FBP+\/FTP+ showed the most severe cortical thickness loss in the entorhinal cortex, temporal lobe GM atrophy, and cognitive impairment. Adding brain atrophy as the third variable resulted in higher odds ratios and improved AUCs for cognitive impairment, with FBP+\/FTP+\/temporal GM or entorhinal cortical atrophy+ demonstrating the strongest associations with cognitive impairment.<\/jats:p>\n                <\/jats:sec>\n                <jats:sec>\n                  <jats:title>CONCLUSION<\/jats:title>\n                  <jats:p>A multimodal approach combining PET and MRI may help improve the assessment of cognitive impairment in AD.<\/jats:p>\n                <\/jats:sec>","DOI":"10.64898\/2026.06.04.26354924","type":"posted-content","created":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T21:50:14Z","timestamp":1780782614000},"source":"Crossref","is-referenced-by-count":0,"title":["Multimodal neuroimaging approach for cognitive impairment in Alzheimer\u2019s disease"],"prefix":"10.64898","author":[{"given":"Marlon","family":"Gonzales","sequence":"first","affiliation":[{"name":"Meharry Medical College, Nashville, TN, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaojian","family":"Kang","sequence":"additional","affiliation":[{"name":"WOMEN CoE, VA Palo Alto Healthcare System, Palo Alto, CA, USA"},{"name":"Rehabilitation Service, VA Palo Alto Healthcare System, Palo Alto, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maheen M.","family":"Adamson","sequence":"additional","affiliation":[{"name":"WOMEN CoE, VA Palo Alto Healthcare System, Palo Alto, CA, USA"},{"name":"Rehabilitation Service, VA Palo Alto Healthcare System, Palo Alto, CA, USA"},{"name":"Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven Z.","family":"Chao","sequence":"additional","affiliation":[{"name":"Neurology Service, VA Palo Alto Healthcare System, Palo Alto, CA, USA"},{"name":"Department of Neurology, Stanford University School of Medicine, Stanford, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Byung C.","family":"Yoon","sequence":"additional","affiliation":[{"name":"Radiology Service, VA Palo Alto Healthcare System, Palo Alto, CA, USA"},{"name":"Department of Radiology, Neuroradiology Division, Stanford University School of Medicine, Stanford, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"name":"the Alzheimer\u2019s Disease Neuroimaging Initiative","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"54368","reference":[{"key":"2026060916150700000_2026.06.04.26354924v1.1","doi-asserted-by":"publisher","DOI":"10.1002\/alz.13859"},{"key":"2026060916150700000_2026.06.04.26354924v1.2","first-page":"8","article-title":"Alzheimer\u2019s and Dementia Guidelines and Tables","volume":"53","year":"2023","journal-title":"Psychopharmacol Bull"},{"key":"2026060916150700000_2026.06.04.26354924v1.3","doi-asserted-by":"publisher","DOI":"10.1002\/alz.12328"},{"key":"2026060916150700000_2026.06.04.26354924v1.4","doi-asserted-by":"crossref","unstructured":"Mart\u00ednez G , Vernooij RW , Padilla PF , Zamora J , Cosp XB , Flicker L. 18F PET with florbetapir for the early diagnosis of Alzheimer\u2019s disease dementia and other dementias in people with mild cognitive impairment (MCI) - Mart\u00ednez, G - 2017 | Cochrane Library. 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