Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right tunneled IJ catheter ends in the right atrium . Lung volumes are slightly low . The lungs are clear aside from minimal left lower lung atelectasis . The cardiac and mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
No acute cardiac or pulmonary process .