Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual lumen central venous catheter tip terminates in the proximal right atrium , unchanged . Heart remains mildly enlarged . Mediastinal and hilar contours are unchanged with unfolding of the thoracic aorta again noted . There are mild atherosclerotic calcifications of the aortic knob . Pulmonary vasculature is normal and the lungs are clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .