Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Mild relative elevation of the right hemidiaphragm is unchanged . New streaky posterior basilar opacification , partly obscuring the posterior right hemidiaphragm is suggestive of minor atelectasis . Projecting over the right mid lung is a new irregular nodular focus , possibly a confluence of shadows but a developing pulmonary nodule should be excluded with further chest imaging when clinically appropriate .
    OUTPUT:
    
No evidence of acute disease . Possible lung nodule ; evaluatin with chest CT is recommended when clinically appropriate .