Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacity in the retrocardiac region could be concerning for a pneumonia in the appropriate clinical setting . Mild pulmonary vascular congestion is noted . Pleural effusion seen on the lateral view is likely on the right . No pneumothorax . Moderate cardiomegaly is unchanged . The aorta is tortuous .
    OUTPUT:
    
1 . Increased opacity in the retrocardiac region could be concerning for pneumonia in the appropriate clinical setting . 2 . Mild pulmonary vascular congestion and unchanged moderate cardiomegaly . 3 . Small pleural effusion , likely on the right .