Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Trace right pleural effusion has decreased compared to prior . No consolidation , left effusion , pneumothorax , or pulmonary edema is seen . Heart and mediastinal contours are within normal limits . Curvilinear density projecting along the dome of the liver appears unchanged . Metallic densities projecting over the right upper quadrant are in the expected location of the gallbladder fossa .
    OUTPUT:
    
Interval decrease in small right pleural effusion .