Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Cardiomediastinal silhouette and hilar contours are unremarkable . No pulmonary edema or pneumothorax . Scoliosis is noted , unchanged . IVC filter is seen projecting over the thoracolumbar spine .
    OUTPUT:
    
No acute intrathoracic process .