Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate right - sided pleural effusion with associated atelectasis at the right lung base , increased opacity within the right lower lung . Likely reflects right lower lobe consolidation versus atelectasis , this best appreciated on the lateral view . The heart is top - normal in size given the AP technique . There is mild interstitial edema , left greater than right . No pneumothorax is seen , and aortic arch calcifications are noted . Compression deformities and degenerative changes of the thoracolumbar spine are noted .
    OUTPUT:
    
Small - moderate right pleural effusion with mild interstitial edema . Increased opacity at the right lung base likely reflects right basilar atelectasis however superimposed infection can not be excluded .