Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume and show minimal interstitial opacities . The cardiac silhouette is top normal . The mediastinal silhouette is normal . There is a small left pleural effusion with associated opacity . The sternal wires are intact . Clips suggesting a CABG are noted in the mediastinum . A left pacer terminates with its leads in the right atrium and right ventricle . Aorta is calcified and tortuous . Clips are noted in the right upper quadrant .
    OUTPUT:
    
Mild interstitial edema . Small left effusion with associated atelectasis .