Kinetic Modeling of Hyperpolarized Carbon-13 Pyruvate Metabolism in the Human Brain.
Where this comes from
- Record sourced from PubMed, PMID 31283497.
- Also identified by DOI 10.1109/TMI.2019.2926437 and PMC identifier 6939147.
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Abstract
Kinetic modeling of the in vivo pyruvate-to-lactate conversion is crucial to investigating aberrant cancer metabolism that demonstrates Warburg effect modifications. Non-invasive detection of alterations to metabolic flux might offer prognostic value and improve the monitoring of response to treatment. In this clinical research project, hyperpolarized [1-<sup>13</sup>C] pyruvate was intravenously injected in a total of 10 brain tumor patients to measure its rate of conversion to lactate ( k<sub>PL</sub> ) and bicarbonate ( k<sub>PB</sub> ) via echo-planar imaging. Our aim was to investigate new methods to provide k<sub>PL</sub> and k<sub>PB</sub> maps with whole-brain coverage. The approach was data-driven and addressed two main issues: selecting the optimal model for fitting our data and determining an appropriate goodness-of-fit metric. The statistical analysis suggested that an input-less model had the best agreement with the data. It was also found that selecting voxels based on post-fitting error criteria provided improved precision and wider spatial coverage compared to using signal-to-noise cutoffs alone.
Medical subject headings
- Brain
- Brain Neoplasms
- Echo-Planar Imaging
- Pyruvic Acid