Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is a small to moderate left pleural effusion . There is a small right pleural effusion . There is no evidence of pneumonia . The cardiomediastinal silhouette and hilar contours are normal . There is no evidence of pneumothorax .
    OUTPUT:
    
Small to moderate left pleural effusion and small right pleural effusion , which appear decreased from the prior CT on ___ when allowing for the differences in technique .