Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All monitoring and support devices are grossly unchanged in position . Compared to prior , right lung opacity has improved , likely in part due to more upright position . A small to moderate left pleural effusion is unchanged . There is no pneumothorax .
    OUTPUT:
    
Decreased right pleural effusion , in part likely related to semiupright position query whether there has been interval thoracentesis . Stable small to moderate left pleural effusion .