Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . The lungs are grossly clear . No definite pleural effusion or pneumothorax is identified , though evaluation is limited on this supine examination . Again noted is a Swan - Ganz catheter , retracted , now terminating in the region of the main pulmonary artery . An endotracheal tube terminates approximately 5 .5 cm above the carina . The intra-aortic balloon pump terminates approximately 6 cm below the aortic knob . The nasogastric tube is seen passing inferior to the diaphragm and is not completely appreciated on this examination . A partially imaged left - sided introducer is new .
    OUTPUT:
    
1 . Interval retraction of IABP and Swan - Ganz catheter .