Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam was limited by technique and body habitus . Within the limitation , the lungs are clear without a focal airspace consolidation or pulmonary edema . There is no pleural effusion or pneumothorax . The mediastinal contours are normal . The heart size is slightly enlarged . The azygous vein is prominent .
    OUTPUT:
    
Mild cardiomegaly . No evidence of pulmonary edema .