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Observer variation in contouring gross tumor volume in patients with poorly defined non-small-cell lung tumors on CT: the impact of 18 FDG-hybrid PET fusion

Computed TomographyPositron Emission TomographyNuclear MedicineEngineeringHealth SciencesMedical ImagingPet-mriObserver VariationBiomedical ImagingCt ScanGross Tumor VolumeMedical Image ComputingRadiation OncologyLung CancerRadiologyFdg-hybrid Pet Fusion