Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Although not as clearly delineated on the frontal exam , on the lateral view there is markedly increased opacity over the lung bases particularly posteriorly . Superiorly the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . Ventricular peritoneal shunt catheter traverses the anterior chest wall .
    OUTPUT:
    
Basilar opacity best seen on the lateral view suspicious for pneumonia or possibly aspiration .