Fig. 7From: Halo artifacts of indwelling urinary catheter by inaccurate scatter correction in 18F-FDG PET/CT imaging: incidence, mechanism, and solutionsSagittal images of a phantom (urine shift pattern). CT image (a), 4-mm and 2-mm voxel μ-maps (b), PET images with non-scatter-correction (NSC), TFS 4-mm, TFS 2-mm, and MCS 4-mm (c). Yellow arrow: urinary catheter in a CT−/PET+ region. Red arrows: 18F-FDG solution in a urinary catheter in a CT−/PET+ regionBack to article page