Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is elevation the left hemidiaphragm , to a lesser extent than on the prior study , with overlying atelectasis . Patchy left base opacity is most likely due to atelectasis , underlying aspiration not excluded . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable and unremarkable . .
    OUTPUT:
    
The left hemidiaphragm is mildly elevated , but to a significantly lesser degree than on the prior study . Streaky left base opacity is most likely due to atelectasis , underlying aspiration not excluded .