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|Title:||Increased cerebral blood flow with increased amyloid burden in the preclinical phase of alzheimer's disease.|
|Authors:||Fazlollahi, Amir;Calamante, Fernando;Liang, Xiaoyun;Bourgeat, Pierrick;Raniga, Parnesh;Doré, Vincent;Fripp, Jurgen;Ames, David;Masters, Colin L;Rowe, Christopher C;Connelly, Alan;Villemagne, Victor L;Salvado, Olivier|
|Affiliation:||CSIRO Health and Biosecurity, Brisbane, Australia..|
University of Sydney, Sydney Imaging and School of Aerospace, Mechanical and Mechatronic Engineering, Sydney, Australia
Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia..
CSIRO Health and Biosecurity, Brisbane, Australia..
Austin Health, Heidelberg, Victoria, Australia
University of Melbourne, Parkville, Australia..
The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Heidelberg, Victoria, Australia
Florey Department of Neuroscience & Mental Health, University of Melbourne, Australia..
Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia
CSIRO Health and Biosecurity, Brisbane, Australia.. CSIRO Data61, Sydney, Australia..
|Citation:||Journal of magnetic resonance imaging 2019; online first: 30 May|
|Abstract:||Arterial spin labeling (ASL) is an emerging MRI technique for noninvasive measurement of cerebral blood flow (CBF) that has been used to show hemodynamic changes in the brains of people with Alzheimer's disease (AD). CBF changes have been measured using positron emission tomography (PET) across the AD spectrum, but ASL showed limited success in measuring CBF variations in the preclinical phase of AD, where amyloid β (Aβ) plaques accumulate in the decades prior to symptom onset. To investigate the relationship between CBF measured by multiphase-pseudocontinuous-ASL (MP-PCASL) and Aβ burden as measured by 11 C-PiB PET imaging in a study of cognitively normal (CN) subjects age over 65. Cross-sectional. Forty-six CN subjects including 33 with low levels of Aβ burden and 13 with high levels of Aβ. 3T/3D MP-PCASL. The MP-PCASL method was chosen because it has a high signal-to-noise ratio. Furthermore, the data were analyzed using an efficient processing pipeline consisting of motion correction, ASL motion correction imprecision removal, temporal and spatial filtering, and partial volume effect correction. General Linear Model. In CN subjects positive for Aβ burden (n = 13), we observed a positive correlation between CBF and Aβ burden in the hippocampus, amygdala, caudate (P < 0.01), frontal, temporal, and insula (P < 0.05). To the best of our knowledge, this is the first study using MP-PCASL in the study of AD, and the results suggest a potential compensatory hemodynamic mechanism that protects against pathology in the early stages of AD. 1 Technical Efficacy: Stage 3 J. Magn. Reson. Imaging 2019.|
preclinical Alzheimer's disease
|Appears in Collections:||Journal articles|
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