Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The large left pleural effusion may have slightly increased compared to prior . The linear opacity within the right lower lung likely represent subsegmental atelectasis . The lungs are otherwise clear . Cardiomediastinal silhouette is stable . The pulmonary vasculature is normal . There is no pneumothorax . There are no acute osseous abnormalities .
    OUTPUT:
    
Slightly increased size of the large left pleural effusion .