Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The mediastinal and hilar contours are unremarkable . Subsegmental atelectasis is seen within the right upper lobe and left mid lung field . No pulmonary edema , focal consolidation , pleural effusion or pneumothorax is demonstrated . Mild elevation of the left hemidiaphragm is unchanged . Multilevel degenerative changes are again identified in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .