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Author

Yiğithan Okar

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2 papers indexed here

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Aug 2026

Baseline 18F-FDG PET/CT-derived heterogeneity index predicts poor pathological response after neoadjuvant chemoradiotherapy in locally advanced rectal cancer.

Baseline 18F-FDG PET/CT-derived HI, MTV, and TLG may help identify LARC patients at risk for Ryan 3 poor pathological response and the workstation-calculable HI may provide complementary information for pretreatment risk stratification.

Yiğithan Okar, Ö. Şahin, S. Erhamamcı et al. · 0 citations
Open access Aug 2026

Age-Related Decline in Anterior Cingulate and Medial Prefrontal Metabolism in Nonneurodegenerative Patients: An 18 F-FDG PET Study

Investigating age-related regional metabolic changes in individuals undergoing brain FDG PET imaging without evidence of neurodegenerative disease supports region-specific metabolic vulnerability during normal aging while highlighting substantial interindividual variability in cerebral glucose metabolism.

Reyhan Toyran, Yiğithan Okar, Ayşe Rana Ovut et al. · 0 citations

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