Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . There is mildly increased perihilar opacity , without focal consolidation , pleural effusion , or pneumothorax . The upper abdomen is unremarkable .
    OUTPUT:
    
Mildly increased perihilar opacity could represent small airways disease or a viral process . No focal consolidation concerning for bacteria pneumonia is identified .