Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes . The meidastinal and hilar contours are normal . There is an opacity in the left lower lobe consistent with pneumonia . No pneumothorax . There is a small to moderate left pleural effusion .
    OUTPUT:
    
Left lower lobe pneumonia with small to moderate left effusion . Recommend close followup radiograph after treatment to ensure resolution .