Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lungs are clear . No large effusion or pneumothorax . 2 tiny radiopaque densities projecting over the right apex and medial left upper arm could reflect external structure . Cardiomediastinal silhouette is stable . No convincing evidence for pneumonia or edema . Bony structures are intact .
    OUTPUT:
    
No signs of pneumonia or edema .