Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A two - lead pacemaker device with leads terminating in the right ventricle and coronary sinus is noted . The heart appears normal in size . Mild unfolding is noted along the thoracic aorta with calcification . Heterogeneous opacification is noted along each lower lung . Opacities are noted in both infrahilar regions , more extensive on the left than right . Particularly striking is patchy mid and peripheral right lower lung opacities . It is difficult to exclude a small pleural effusion on the right given partial exclusion of the costophrenic sulcus . Blunting of the left costophrenic sulcus may be due to a small effusion or chronic thickening . There is no pneumothorax .
    OUTPUT:
    
Heterogeneous opacification of the mid-to - lower lungs including right mid lung opacity . It may be valuable to compare to prior radiographs if available . Possibly , this appearance may be due to pneumonia in the right lung , superimposed on background pulmonary architecture , but findings are potentially more chronic .