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Reduced acquisition time PET pharmacokinetic modelling using simultaneous ASL-MRI: proof of concept.
- Source :
-
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism [J Cereb Blood Flow Metab] 2019 Dec; Vol. 39 (12), pp. 2419-2432. Date of Electronic Publication: 2018 Sep 05. - Publication Year :
- 2019
-
Abstract
- Pharmacokinetic modelling on dynamic positron emission tomography (PET) data is a quantitative technique. However, the long acquisition time is prohibitive for routine clinical use. Instead, the semi-quantitative standardised uptake value ratio (SUVR) from a shorter static acquisition is used, despite its sensitivity to blood flow confounding longitudinal analysis. A method has been proposed to reduce the dynamic acquisition time for quantification by incorporating cerebral blood flow (CBF) information from arterial spin labelling (ASL) magnetic resonance imaging (MRI) into the pharmacokinetic modelling. In this work, we optimise and validate this framework for a study of ageing and preclinical Alzheimer's disease. This methodology adapts the simplified reference tissue model (SRTM) for a reduced acquisition time (RT-SRTM) and is applied to [ <superscript>18</superscript> F]-florbetapir PET data for amyloid-β quantification. Evaluation shows that the optimised RT-SRTM can achieve amyloid burden estimation from a 30-min PET/MR acquisition which is comparable with the gold standard SRTM applied to 60 min of PET data. Conversely, SUVR showed a significantly higher error and bias, and a statistically significant correlation with tracer delivery due to the influence of blood flow. The optimised RT-SRTM produced amyloid burden estimates which were uncorrelated with tracer delivery indicating its suitability for longitudinal studies.
- Subjects :
- Female
Humans
Male
Proof of Concept Study
Alzheimer Disease diagnostic imaging
Alzheimer Disease metabolism
Alzheimer Disease physiopathology
Amyloid beta-Peptides metabolism
Aniline Compounds administration & dosage
Aniline Compounds pharmacokinetics
Cerebrovascular Circulation
Ethylene Glycols administration & dosage
Ethylene Glycols pharmacokinetics
Models, Cardiovascular
Positron-Emission Tomography
Subjects
Details
- Language :
- English
- ISSN :
- 1559-7016
- Volume :
- 39
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
- Publication Type :
- Academic Journal
- Accession number :
- 30182792
- Full Text :
- https://doi.org/10.1177/0271678X18797343