Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unchanged with moderate cardiomegaly compared to ___ study . The hila and pleura are unremarkable . Mild left lower lobe atelectasis seen . No pleural effusions , or pulmonary edema are seen .
    OUTPUT:
    
No evidence of pulmonary edema or pneumonia .