Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Linear opacities at the left lung base are compatible with subsegmental atelectasis . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities present .
    OUTPUT:
    
Left basilar subsegmental atelectasis . Otherwise , no acute cardiopulmonary abnormality .