Fig. 9From: Halo artifacts of indwelling urinary catheter by inaccurate scatter correction in 18F-FDG PET/CT imaging: incidence, mechanism, and solutionsSagittal images of a phantom (tube curve 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). Red arrows: 18F-FDG solution in the urinary catheterBack to article page