Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged but unchanged . The mediastinal and hilar contours are unremarkable and similar to the prior study . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is seen . Subsegmental atelectasis is noted in the left lung base . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .