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• W2770622801 abstract "11C-acetate is a positron emission tomography (PET) tracer of oxidative metabolism, whereas hyperpolarized 13C-acetate can be used in magnetic resonance imaging (MRI) for investigating specific metabolic processes. The aims of this study were to examine if the kinetic formalism of 11C-acetate PET in the kidneys is comparable to that of 13C-acetate MRI, and to compare the dynamic metabolic information of hyperpolarized 13C-acetate MRI with that obtained with 11C-acetate PET. Rats were examined with dynamic hyperpolarized 13C-acetate MRI or 11C-acetate PET before and after intravenous injection of furosemide, a loop diuretic known to alter both the hemodynamics and oxygen consumption in the kidney. The metabolic clearance rates (MCR) were estimated and compared between the two modalities experimentally in vivo and in simulations. There was a clear dependency on the mean transit time and MCR for both 13C-acetate and 11C-acetate following furosemide administration, while no dependencies on the apparent renal perfusion were observed. This study demonstrated that hyperpolarized 13C-acetate MRI is feasible for measurements of the intrarenal energetic demand via the MCR, and that the quantitative measures are correlated with those measured by 11C-acetate PET, even though the temporal window is more than 30 times longer with 11C-acetate." @default.
• W2770622801 created "2017-12-04" @default.
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• W2770622801 date "2017-11-22" @default.
• W2770622801 modified "2023-10-13" @default.
• W2770622801 title "Hyperpolarized [1-13C]-acetate Renal Metabolic Clearance Rate Mapping" @default.
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• W2770622801 doi "https://doi.org/10.1038/s41598-017-15929-x" @default.
• W2770622801 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5700138" @default.
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