Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph demonstrates minimal right basilar opacification , most likely reflecting atelectasis . There is no large focal consolidation , pleural effusion , or pneumothorax . The cardiac silhouette is normal in size , the mediastinal contours are normal .
    OUTPUT:
    
Minimal right basilar airspace opacity , likely reflecting atelectasis .