Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest is provided . Lung volumes are low bilaterally . Mild residual subcutaneous emphysema is seen on the left . There is no pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process , though low lung volumes limits detection of focal consolidation .