Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Trace right pleural effusion is noted . No pneumothorax is seen . Linear opacities within the right lung base are compatible with subsegmental atelectasis . No focal consolidation is present . Elevation of the right hemidiaphragm is of unknown chronicity . There are no acute osseous abnormalities .
    OUTPUT:
    
Elevated right hemidiaphragm , of unknown chronicity . Small right pleural effusion . Otherwise , no acute cardiopulmonary abnormality .