Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours are unremarkable . There is widespread hazy indistinct opacification of the upper lungs as well as the right lower lung , and at the right lung base in particularly , Kerley B lines can be appreciated . Patchy retrocardiac opacity obscures the medial left heart border and it is difficult to exclude a small pleural effusion on the left , noting blunting also seen along the left costophrenic sulcus . Heterogeneous pulmonary architecture is concerning for emphysema .
    OUTPUT:
    
Heterogeneous opacification , for which pulmonary edema superimposed on abnormal pulmonary architecture could be considered , since emphysema is suspected . Multifocal pneumonia could also be considered . Opacities are overall similar in distribution but more prominent .