Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Indistinct airspace opacities in the right lung base may represent atelectasis or early pneumonia depending upon the clinical setting . There is no pneumothorax , pulmonary edema , or pleural effusion . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Right lung base airspace opacities may represent atelectasis or early pneumonia , depending upon the clinical setting .