Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . VP shunt tubing traverses the left hemi thorax . Lung volumes are low though allowing for this , there is no definite evidence for pneumonia , edema , effusion or pneumothorax . Crowding of bronchovascular markings in the lower lungs and perihilar region does limit the evaluation . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process . VP shunt tubing crosses the left hemi thorax .