Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are low with increased opacity in the left lower lobe concerning for pneumonia or atelectasis . No large effusion or pneumothorax . No edema . Cardiomediastinal silhouette is normal . Chronic right rib cage deformities again noted . Deformity of the right mid shaft clavicle reflects old injury .
    OUTPUT:
    
Left lower lobe opacity concerning for atelectasis versus pneumonia / aspiration .