Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to radiograph taken approximately 20 hours prior , there is no significant change . The tip of the central line is in the right atrium . There is persistent bibasilar atelectasis . The left lung volume is low , accentuating interstitial markings . Otherwise , there is no evidence of pulmonary edema . The tracheostomy tube is in place . The cardiopulmonary silhouette is mildly enlarged and grossly unchanged from prior . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Central line terminating in the right atrium . No significant interval change .