Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal left basilar atelectasis has improved . Left pleural effusion is small . Mediastinal and cardiac contour are normal . Left - sided PICC line ends in lower SVC . There is no pneumothorax .
    OUTPUT:
    
1 . Left pleural effusion is small and unchanged . 2 . Left lower lung atelectasis is slightly improved .