Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A stent projects over the left heart , consistent with known LAD stent . The heart is normal in size . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Lung volumes remain low , but there is no focal consolidation concerning for pneumonia . The previously noted linear opacity at the left lung base is not as apparent on the current study . The upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .