Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a single - lead pacemaker device terminating in the right ventricle . The heart is mild - to - moderately enlarged , as before . There is central prominence of pulmonary and interstitial vascularity including indistinct pulmonary vascularity , suggesting mild pulmonary vascular congestion . The lateral view depicts a convex opacity associated with the right posterior hemithorax , which is the site where moderate pleural effusion was present in the fairly recent past as well as posterior consolidative opacity . This appearance may correspond to evolution of pulmonary infarction , as suspected previously , or a loculated pleural effusion . A trace pleural effusion of more free flowing character is suggested along the right costophrenic sulcus on the frontal view . Each major fissure is also slightly thickened , also suggesting fluid overload . The bony structures are unremarkable .
    OUTPUT:
    
1 . Findings suggesting mild pulmonary vascular congestion . 2 . Convex opacity situated in the right posterior costophrenic sulcus . Differential considerations include sequelae of recent suspected pulmonary infarct or a persistent loculated component of previously seen moderate right - sided pleural effusion , which has otherwise decreased substantially .