Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Overlying EKG leads are present . Lung volumes are low . Allowing for limitations , the lungs are clear . No signs of pneumonia or edema . No large effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
No acute intrathoracic process .