Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the most recent study , the left hemidiaphragmatic contour is now better defined , indication that the left pleural effusion and atelectasis are improving . There are linear opacities surrounding the mediastinum , consistent with chronic radiation changes . There is mild pulmonary vascular engorgement , but no frank pulmonary edema . There is no pneumothorax . The heart size is normal and the mediastinal width is unchanged . A left PICC has been removed .
    OUTPUT:
    
1 . Interval resolution of left lower lobe atelectasis and pleural effusion . 2 . Mild pulmonary vascular engorgement without frank pulmonary edema .