131 Understanding immune checkpoint inhibitors through PET-imaging studies They showed that [89Zr]Zr-pembrolizumab PET imaging in patients with advanced non-small-cell lung cancer (NSCLC) was safe, apart from one grade 3 myalgia after tracer injection, and feasible. Radiotracer uptake was correlated with efficacy of pembrolizumab, however, not statistically significant, which may be due to the small number of events (n=3) and corresponding low power. 7
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