Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates a stable cardiomediastinal silhouette allowing for differences in patient positioning when compared to prior study dated ___ . No focal opacity is identified convincing for pneumonia . There is no evidence of overt pulmonary edema . No large pleural effusion or pneumothorax is seen .
    OUTPUT:
    
No acute intra thoracic abnormality . Moderate cardiomegaly