Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The moderate - to - large right - sided pleural effusion is again seen . There is no definite left pleural effusion . Cardiac silhouette is enlarged but difficult to accurately assess given silhouetting on the right . Atherosclerotic calcification is seen at the aortic arch . No acute osseous abnormalities .
    OUTPUT:
    
Moderate - to - large right pleural effusion with adjacent atelectasis . Please note , the underlying infection can not be excluded .