Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall , the appearance of the lungs is similar compared to the prior study , with low lung volumes and areas of bilateral pulmonary opacity which may be due to mild edema superimposed on chronic lung disease . Cardiac and mediastinal silhouettes are grossly stable . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
No significant interval change from the prior study .