Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest shows reduced lung volume with new left base opacification due to large atelectasis and likely pleural effusion , compatible with aspiration . Right lung is still clear . Heart size is partially obscured by left base atelectasis , but seems normal . There is no pneumothorax .
    OUTPUT:
    
Left base atelectasis and pleural effusion , compatible with aspiration .