Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear without lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . Mild linear opacity at the right lung base extending towards the hilum likely reflects subsegmental atelectasis . Irregular calcification projecting over the left upper lung field may reflect calcified pleural plaques . The cardiomediastinal silhouette is unremarkable in appearance . No evidence of free air beneath the diaphragm . No displaced rib fracture .
    OUTPUT:
    
Probable linear right lower lobe atelectasis . Otherwise , no acute cardiopulmonary process .