Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is unfolded . Pulmonary vasculature is normal . Linear opacity in the left lung base again may reflect atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .