Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright frontal and lateral views of the chest provided . Dual - lead pacer unchanged . Lung volumes are low . There is no focal consolidation , effusion , or signs of congestive heart failure . There is no pneumothorax . Cardiomediastinal silhouette is stable with an unfolded thoracic aorta noted . Heart size remains within normal limits . The bony structures are intact .
    OUTPUT:
    
No acute findings in the chest .