Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is upper limits of normal in size and accompanied by mild pulmonary vascular congestion and small right pleural effusion . Bibasilar platelike atelectasis is slightly improved . There is no pneumothorax or focal consolidation . The cardiomediastinal silhouette is stable . The left - sided Bochdalek 's hernia is unchanged . Impression on the right aspect of the trachea may be related to an enlarged thyroid gland .
    OUTPUT:
    
1 . No evidence of pneumonia .