A narrative review of the principal Aβ positron emission tomography radioligands and their methodological framework, including visual reads, the standardized uptake value ratio, and the Centiloid scale, which harmonized quantitative output across tracers, scanners, and protocols and may enable cross-site comparison in multicenter studies and disease-modifying trials.
Abstract INTRODUCTION Alzheimer's disease (AD) is biologically defined by amyloid beta and tau pathology. Available biomarkers enable early diagnosis but differ in targets, accessibility, and utility. This review synthesizes evidence for plasma biomarkers, magnetic resonance imaging (MRI), and positron emission tomogra...
Jia-Yu Liu, Chou Xu, Yu-Xin Wang et al.· Alzheimer's & Dementia· 0 citations
Summary Background Reduced [18F]Fluorodeoxyglucose ([18F]FDG)-PET uptake is a core imaging feature of Alzheimer's disease (AD). While tau load correlates with this metabolic signature, it remains unclear whether the spatial extent of tauopathy (SEOT) more accurately explains brain glucose hypometabolic patterns. Here,...
Arthur C. Macedo, Lydia Trudel, S. A. Hosseini et al.· EBioMedicine· 1 citation
BackgroundAlzheimer's disease (AD) is increasingly defined biologically. Amyloid positron emission tomography (PET) is a validated biomarker; however, evidence from truly consecutive, real-world memory-clinic cohorts spanning subjective cognitive decline (SCD), mild cognitive impairment (MCI), and early AD remains limi...
Heii Arai, Satoko Aiba, Hideo Yamamoto et al.· Journal of Alzheimer's Disea...· 0 citations
Patients with Alzheimer’s disease (AD) and clinically overlapping neurodegenerative diseases are classified molecularly using the A/T/N classification system. Apart from fluid biomarkers and structural MRI, A/T/N assessment incorporates β-amyloid-PET (A), tau-PET (T), and [18F]FDG-PET (N). We evaluated if dynamic featu...
Johannes S. Gnörich, J. Kusche-Palenga, Agnes Kling et al.· Molecular Neurodegeneration· 0 citations
From a neuropathological perspective, the most well-known pathological change in Alzheimer's disease (AD) to date is primarily tau protein hyperphosphorylation, which leads to the formation of intracellular neurofibrillary tangles (NFTs) and amyloid protein deposition-namely, the accumulation of amyloid protein (Aβ) an...
Meng-Ying Lu, Yu-Shan Zheng, Ting-Ting Chen et al.· Journal of Visualized Experi...· 0 citations
Quantitative T1 mapping (qT1) is a magnetic resonance imaging (MRI) biomarker of brain microstructural changes; however, its application in Alzheimer disease (AD) remains limited. We compared cortico-limbic qT1 values between patients with AD and healthy controls (HCs) and examined their relationship with amyloid burde...
L. Gualco, N. Montobbio, M. Losa et al.· European Radiology Experimen...· 0 citations
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