Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left dual - chamber pacemaker is in left pectoral region with lead tip projecting over the right atrial appendage and right ventricular apex . Bilateral reticular interstitial opacities . Vascular engorgement , mediastinal vein dilataion , and cephalization with a moderately enlarged heart . Mild bibasilar plate - like atelectasis . No pneumothorax or pleural effusion . No bony abnormality .
    OUTPUT:
    
1 . Diffuse pulmonary fibrosis . 2 . Mild pulmonary edema and bibasilar atelectasis .