Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post aortic valve replacement surgery . Mitral annular calcifications are prominent . The cardiac , mediastinal and hilar contours are probably unchanged allowing for differences in technique . There is increasing opacity at the left lung base including involvement of much of the left lower lobe with an opacity suggesting pneumonia . There is probably a coinciding pleural effusion . Better delineated is a small and probably new pleural effusion on the right . Surgical clips project over the right axilla and epigastric region . Thoracic compression fractures are unchanged . The bones appear demineralized .
    OUTPUT:
    
Increasing left basilar opacification suggesting pneumonia in the left lower lobe . Small bilateral pleural effusions .