Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are markedly low in there is underpenetrated technique which limits assessment . The cardiomediastinal silhouette appears prominent though this is likely due to portable AP technique . There is no definite consolidation , large effusion or pneumothorax . No overt signs of edema . Bony structures are intact peer
    OUTPUT:
    
Limited , negative .