Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates no focal consolidation , pleural effusion , or pneumothorax . Obscuration of the hemidiaphragms is unchanged and explained by mediastinal lipomatosis shown on prior chest CT . Trace atelectasis is present at the left lung base . The cardiomediastinal silhouette is normal . There is no pulmonary vascular engorgement .
    OUTPUT:
    
No evidence of pulmonary edema .