Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low but slightly improved from the prior examination with bibasilar atelectasis . Ventricular shunt tubing courses to the right hemithorax after which it is not well followed . Cardiomediastinal silhouette is poorly assessed due to low lung volumes but appears unremarkable . No pneumothorax is seen .
    OUTPUT:
    
No acute intrathoracic process .