Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and well - aerated lungs . There is mildly increased opacity in the right lower lung , which could represent atelectasis , but an early pneumonia can not be excluded . There is no pleural effusion or pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Mildly increased opacity in the right lower lung , which could represent atelectasis , but an early pneumonia can not be excluded .