Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small residual pneumomediastinum , decreased compared to the prior study . Widening of the mediastinum is similar in degree . Mild pulmonary vascular engorgement persists with linear atelectasis in the right lung base , at the site of the prior chest drain . The chest tubes have been removed . The Swan - Ganz catheter has been removed , a large poor right internal jugular catheter terminates in the mid SVC . There is a focal airspace opacity adjacent to the left heart border which likely reflects atelectasis but infection can not be excluded .
    OUTPUT:
    
No pneumothorax seen . Linear atelectasis at the right lung base . An opacity adjacent the left heart border likely reflects atelectasis , infection can not be excluded .