Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate mildly prominent cardiac silhouette . The mediastinal and hilar contours are unremarkable . There is subtle increased opacity in the left lung base , new since prior exam , raising question of early evolving infection versus atelectasis , to be clinically correlated . There is no pneumothorax , vascular congestion , or pleural effusion . Several clips project over the right upper abdomen .
    OUTPUT:
    
New subtle focal opacity in the left lung base , raising question of early evolving infection versus atelectasis , to be clinically correlated .