Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is atelectasis at the left lung base , with tenting of the left hemidiaphragm , likely a result of subsegmental volume loss in the left lower lobe . This is new compared with one ___ No focal consolidation is identified . The cardiomediastinal silhouette and hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Tenting of the left hemidiaphragm , new since prior study , and likely reflects atelectasis .