Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Mild cardiomegaly is unchanged compared to the prior exam . Note is made of mild bibasilar atelectasis . No focal consolidations , large pleural effusion , or pneumothorax is identified . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormalities identified .