Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As on the prior radiograph from ___ , there is a triangular opacity at the left lung base compatible with atelectasis . The lungs are mildly hyperinflated . Heart size and mediastinal contours are normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Hyperinflated lungs with left basilar atelectasis . In the setting of hyperinflation , isolated atelectasis can be seen in pulmonary emboli , although not specific .