Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Shallow inspiration accentuates heart size , pulmonary vascularity , which are mildly improved compared with prior exam . There is no pleural effusion . Strand of atelectasis or fibrosis at the lung base . Minimal bibasilar opacities , may represent atelectasis in the setting of shallow inspiration , infection can not be excluded . Mild pectus excavatum .
    OUTPUT:
    
Minimal patchy basilar opacities , likely atelectasis in the setting of shallow inspiration ; infection can not be excluded .