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Incidental CT findings in FDG-PET/CT. A curvilinear dark line (white arrowhead) in the myocardium indicating fibrosis in patients with a history of myocardial infarction (a). The interventricular septum was visualized in patient with low hemoglobin concentration due to the decreased CT density in blood pool (b). The patient had a history of occluding interatrial septal defect (c). A high-density foci (white arrowhead) in the interatrial septal indicated the operative site
