Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A transesophageal catheter , right IJ central venous catheter , and multiple intact sternal wires are unchanged in position . There has been interval extubation . The patient is post aortic valve replacement . A moderate right pleural effusion , accompanied by adjacent compressive atelectasis , appears slightly improved since ___ . The left lung remains clear . There is no pneumothorax .
    OUTPUT:
    
Slight improvement of a moderate right pleural effusion with adjacent compressive atelectasis ___ . No pneumothorax .