Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Heart size and cardiomediastinal contours are normal . Lung volumes are low with small right base atelectasis . Lungs are otherwise clear without focal consolidation , pleural effusion , or pneumothorax . No pneumoperitoneum is appreciated on this upright view .
    OUTPUT:
    
No pneumoperitoneum . Low lung volumes .