Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are normal . Atherosclerotic calcifications are noted at the aortic knob . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . Mild scarring is noted in the lung apices . No displaced fractures are evident .
    OUTPUT:
    
No acute cardiopulmonary abnormality .