Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are small . There is mild pulmonary edema . There is moderate cardiomegaly . There is an opacity in the left right lung base which could represent atelectasis versus early pneumonia . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Low lung volumes with moderate cardiomegaly and mild pulmonary edema . 2 . Right parenchymal lung base opacity that can represent early pneumonia in the appropriate clinical setting . Short - term follow - up chest x-ray in ___ hours is recommended