Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top normal to mildly enlarged . The mediastinal contours are unremarkable . No focal consolidation , pleural effusion , evidence of a pneumothorax is seen . There is minimal left base atelectasis . No overt pulmonary edema is seen . Mild degenerative changes are seen along the spine .
    OUTPUT:
    
Top - normal to mildly enlarged cardiac silhouette without overt pulmonary edema . No pleural effusion seen .