Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views the chest were provided . Lung volumes are low with poor visualization of the retrocardiac space . No convincing signs of pneumonia or pleural effusion . No pneumothorax is seen . Cardiomediastinal silhouette appears stable . Bony structures appear intact .
    OUTPUT:
    
Limited , negative .