Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable supine view of the chest . Lungs appear clear without focal consolidation , or supine evidence for an effusion or pneumothorax . There is opacity at the left costophrenic angle which could represent atelectasis . Please refer to CT torso performed subsequently . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact .
    OUTPUT:
    
No acute findings . Please refer to subsequent CT torso for further details .