Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with leads terminating in unchanged positions in the right atrium and right ventricle . Mild enlargement of the cardiac silhouette is unchanged . Aortic knob calcifications are present . The mediastinal and hilar contours are similar . Mild interstitial pulmonary edema is demonstrated with a probable trace left pleural effusion , although the posterior costophrenic angles are excluded on the lateral view . No pneumothorax is present . Patchy atelectasis is again seen in the lung bases . Moderate multilevel degenerative changes are present in the thoracic spine .
    OUTPUT:
    
Mild interstitial pulmonary edema with probable small left pleural effusion . Patchy bibasilar opacities , likely atelectasis .