Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . The lungs are fairly well aerated , with persistent mild left base atelectasis . No appreciable pleural effusion is seen . There is no pneumothorax . The visualized upper abdomen is unremarkable . The left hemidiaphragm is elevated , as before .
    OUTPUT:
    
Mild left base atelectasis . No appreciable pleural effusion or focal consolidation .