Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower than on the prior study , accentuating the cardiac silhouette and bronchovascular structures . New patchy bibasilar opacities have developed , right greater than left as well as minimal basilar interstitial opacities . Pulmonary vascularity is within normal limits allowing for accentuation by lower lung volumes . There are no pleural effusions . Note is made of previous median sternotomy and aortic valve surgery .
    OUTPUT:
    
New combined alveolar and interstitial basilar lung opacities , concerning for an atypical pneumonia in the setting of cough and fever .