Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight asymmetric increased opacity in the right lower lobe on the frontal view without a definite correlate on the lateral view could simply reflect atelectasis or early pneumonia . No pleural effusion , pneumothorax , or edema . The heart is normal in size . The mediastinum is not widened . No acute osseous abnormality .
    OUTPUT:
    
Slight asymmetric increased opacity in the right lower lobe could reflect an early pneumonia in the appropriate clinical situation .