Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is some increased opacity at the right lung base which could be due to atelectasis , although infectious process is not excluded in the appropriate clinical setting . Left base atelectasis is seen . There is no pleural effusion or pneumothorax . The cardiac silhouette is stable but remains mildly enlarged . Mediastinal and hilar contours are stable .
    OUTPUT:
    
Relative increased opacity at the right lung base could be due to atelectasis or infection . Stable enlargement of the cardiac silhouette .