Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral mild and diffuse pulmonary opacities is likely mild pulmonary edema . Increased retrocardiac density reflects left lower lung atelectasis . Aorta is mildly tortuous and moderately calcified . Heart size is top normal . Mediastinal and hilar contours are unremarkable . Small left pleural effusion is presumed .
    OUTPUT:
    
Mild pulmonary edema and left lower lung atelectasis . Small left small pleural effusion is presumed .