Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary edema and small bilateral pleural effusions are improved from ___ . Right perihilar and lower lung opacities are unchanged . Postoperative mediastinal contours are more distinct and cardiac borders are slightly smaller than on ___ . Mitral annulus calcifications and right apical scarring versus vascular calcification remain .
    OUTPUT:
    
1 . Right lower lobe opacities suggest pneumonia or lung abscess . 2 . Mild congestive heart failure and small bilateral pleural effusions improved from ___ .