Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Previously described nonspecific left upper lobe opacity has resolved . Lungs are currently clear except for minimal linear atelectasis or scar at the bases . Biapical thickening , right greater than left is relatively similar to older studies dating back to ___ and likely due to pleural and parenchymal scarring . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .