Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . Right IJ sheath terminates at the origin of the right brachiocephalic vein . Mild interstitial edema and vascular engorgement have improved and are superimposed on diffuse pulmonary fibrosis . Small right pleural effusion is stable . Bibasilar opacities have increased , representing either atelectasis or infection . No pneumothorax . Heart size and mediastinal contours are stable .
    OUTPUT:
    
Improved pulmonary edema on background of chronic fibrosing interstitial lung disease . Right base atelectasis and effusion are stable .