Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is unfolded . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Except for minimal subsegmental atelectasis in the lower lobes , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .