Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Evaluation is limited due to underpenetration . Allowing for this , the lungs are clear . No overt signs of edema . Cardiomediastinal silhouette is stable . No large pneumothorax . Bony structures are intact .
    OUTPUT:
    
Limited exam due to underpenetration . No overt signs of edema or pneumonia .