Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lung volumes are very low compared to prior study . This crowds the pulmonary vasculature . Within that limitation , heart size is top normal . There is mild pulmonary vascular congestion . There is a right lower lobe opacity and possible left lower lobe opacity . There may be a small left pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Very low lung volumes compared to prior exams . There is a right lower lobe opacity and possibly left lower lobe opacity , which may represent areas of pneumonia . Mild pulmonary vascular congestion .