Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left lower lobe opacity concerning for pneumonia . Lung volumes are including moderately severe atelectasis in the lingula . No pneumothorax or pleural effusion . The stomach is very distended .
    OUTPUT:
    
Left lower lobe pneumonia and lingular atelectasis . Recommend follow up radiograph after acute symptoms to rule out mass causing post obstructive pneumonia . Stomach is very distended .