Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , without focal airspace consolidation to suggest pneumonia . Linear atelectasis is seen at the left lung base . A right side IJ catheter tip terminates in the mid SVC . There is no pleural effusion or pneumothorax . Apical pleural thickening is seen . The heart size is normal . Calcifications are present within the aortic arch .
    OUTPUT:
    
Appropriately positioned central line and no evidence for acute infectious process .