Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs well expanded . There is a hazy opacity in the right lateral lung base , which could represent atelectasis or pneumonia in the right clinical setting . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is mildly enlarged .
    OUTPUT:
    
Subtle haziness right lateral lung base may be artifactual , but which could represent atelectasis or pneumonia in the right clinical setting .