Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . There is no pleural effusion or pneumothorax . Ill - defined airspace opacities are most conspicuous in the right mid to upper lung . Mild perihilar vascular congestion is noted . Heart size is normal . Hilar and mediastinal silhouettes are otherwise unremarkable . Partially imaged upper abdomen is normal .
    OUTPUT:
    
Ill - defined airspace opacities , most pronounced in right mid - to - upper lung , may represent infection in the appropriate clinical setting .