Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There relatively low lung volumes . There is increased opacity projecting over the right hemi thorax likely due to increased right pleural effusion with overlying atelectasis , underlying infectious process not excluded . Possible trace left pleural effusion . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable . No pneumothorax is seen .
    OUTPUT:
    
Increased opacity projecting over the right hemi thorax likely due to increased right pleural effusion with overlying atelectasis , underlying infectious process not excluded .