Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low with linear left basilar opacity which is likely atelectasis . The lungs are otherwise clear . Cardiac silhouette is top - normal but likely accentuated by AP technique and low lung volumes . Median sternotomy wires are intact . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .